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1
Lyons, Lee Ann, Mary E. Brand, Peg Gronemeyer, et al. "Comparing Contributions of Passive and Active Tick Collection Methods to Determine Establishment of Ticks of Public Health Concern Within Illinois." Journal of Medical Entomology 58, no. 4 (2021): 1849–64. http://dx.doi.org/10.1093/jme/tjab031.
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Abstract In Illinois, between 1990 and 2017, tick-borne diseases in humans increased 10-fold, yet we have insufficient information on when and where people are exposed to vector ticks (Ixodida: Ixodidae). The aims of our research were to compare contributions of passive and active tick collection methods in determining establishment of ticks of public health concern and obtain information on tick distributions within Illinois. We used three surveillance strategies within the Illinois Tick Inventory Collaboration Network to gather information about the ticks of public health concern: 1) passive collection (voluntary submission by the public); 2) systematic collection (biweekly active surveillance); and 3) special collections (active collections in locations of special interest). Of collected adult and nymphal ticks, 436 were from passive collections, 142 from systematic collections, and 1,270 from special collections. Tick species distribution status changed in 36 counties. Our data provide noteworthy updates to distribution maps for use by public health agencies to develop prevention and control strategies. Additionally, the program built a network of collaborations and partnerships to support future tick surveillance efforts within Illinois and highlighted how the combination of the three surveillance strategies can be used to determine geographic spread of ticks, pinpoint locations in need of more surveillance, and help with long-term efforts that support phenology studies.
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Gilliam, Mary, Will Rechkemmer, Kenneth McCravy, and Seán Jenkins. "The Influence of Prescribed Fire, Habitat, and Weather on Amblyomma americanum (Ixodida: Ixodidae) in West-Central Illinois, USA." Insects 9, no. 2 (2018): 36. http://dx.doi.org/10.3390/insects9020036.
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The distribution of Amblyomma americanum (L.) is changing and reports of tick-borne disease transmitted by A. americanum are increasing in the USA. We used flagging to collect ticks, surveyed vegetation and collected weather data in 2015 and 2016. A. americanum dominated collections in both years (97%). Ticks did not differ among burn treatments; however, tick abundance differed between years among total, adult, and larval ticks. Habitat variables showed a weak negative correlation to total ticks in respect to: Shannon diversity index, percent bare ground, perennial cover, and coarse woody debris. Nymphal ticks showed a weak negative correlation to percent bare ground and fewer adults were collected in areas with more leaf litter and coarse woody debris. Conversely, we found larvae more often in areas with more total cover, biennials, vines, shrubs, and leaf litter, suggesting habitat is important for this life stage. We compared weather variables to tick presence and found, in 2015, temperature, precipitation, humidity, and sample period influenced tick collection and were life stage specific. In 2016, temperature, precipitation, humidity, wind, and sample period influenced tick collection and were also life stage specific. These results indicate that spring burns in an oak woodland do not reduce ticks; other variables such as habitat and weather are more influential on tick abundance or presence at different life stages.
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Egizi, Andrea M., James L. Occi, Dana C. Price, and Dina M. Fonseca. "Leveraging the Expertise of the New Jersey Mosquito Control Community to Jump Start Standardized Tick Surveillance." Insects 10, no. 8 (2019): 219. http://dx.doi.org/10.3390/insects10080219.
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Despite the rising incidence of tick-borne diseases (TBD) in the northeastern United States (US), information and expertise needed to assess risk, inform the public and respond proactively is highly variable across states. Standardized and well-designed tick surveillance by trained personnel can facilitate the development of useful risk maps and help target resources, but requires nontrivial start-up costs. To address this challenge, we tested whether existing personnel in New Jersey’s 21 county mosquito control agencies could be trained and interested to participate in a one-day collection of American dog ticks (Dermacentor variabilis), a presumably widespread species never before surveyed in this state. A workshop was held offering training in basic tick biology, identification, and standard operating procedures (SOPs) for surveillance, followed by a one-day simultaneous collection of D. variabilis across the state (the “NJ Tick Blitz”). In total, 498 D. variabilis were collected from 21 counties and follow-up participant surveys demonstrated an increase in knowledge and interest in ticks: 41.7% of respondents reported collecting ticks outside the Tick Blitz. We hope that the success of this initiative may provide a template for researchers and officials in other states with tick-borne disease concerns to obtain baseline tick surveillance data by training and partnering with existing personnel.
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Sylla, Massamba, Marc Souris, and Jean-Paul Gonzalez. "Ticks of the genus Rhipicephalus Koch, 1844 in Senegal: Review host associations, chorology, and associated human and animal pathogens." Revue d’élevage et de médecine vétérinaire des pays tropicaux 74, no. 1 (2021): 61–69. http://dx.doi.org/10.19182/remvt.36318.
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Ticks of the genus Rhipicephalus (Acari: Ixodidae) in Senegal were reviewed. The data presented originate from a tick collection maintained at IRD’s Laboratory of Medical Entomology since 1967 and continuously enriched with samples obtained from different vertebrate hosts captured during various projects conducted in Senegal from 1987 to 2007. Fifteen Rhipicephalus tick species were collected and characterized, resulting in 1127 referenced collections. Three species were of the Boophilus subgenus: Rhipicephalus (Bo.) annulatus, Rh. (Bo.) decoloratus and Rh. (Bo.) geigyi. The twelve others were Rh. boueti, Rh. cuspidatus, Rh. evertsi, Rh. guilhoni, Rh. lunulatus, Rh. muhsamae, Rh. sanguineus, Rh. senegalensis, Rh. sulcatus, Rh. tricuspis, Rh. turanicus and Rh. ziemanni. Although there were recent indications that Rh. turanicus should have been considered as part of the Rh. sanguineus s.l. complex, data regarding these two ticks were presented separately. The collection comprised 14,165 tick specimens at different developmental stages. Data concerning their host relationships as well as distribution and seasonal dynamics were also presented. Vertebrate hosts were identified and listed in the different ecological zones of Senegal. The role of the ticks as potential vectors of pathogens has been reviewed. Climate change, causing variations in rainfall and temperature, will impact tick distribution and dynamics. The situation supports the necessity of this inventory of tick populations for (re)emerging tick-borne diseases surveillance and monitoring.
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Solovev, A. I., E. I. Bondarenko, D. I. Timofeev, A. I. Rakin, and V. Yu Kravtsov. "Tticks collection of academician E.N. Pavlovsky and modern prospects of molecular genetic research." Bulletin of the Russian Military Medical Academy 21, no. 2 (2019): 140–48. http://dx.doi.org/10.17816/brmma25934.
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E.N. Pavlovsky is founder of doctrine about the natural foci diseases. The unique collection of ticks (Argasidae), which are highly specialized ectoparasites of terrestrial vertebrate animals. Part of the collection was formed during the Great Patriotic War (1941-1943) in Iran in the Trans-Iranian Route zone (Persian Corridor), one of the strategic directions for the delivery of American and British military aid to the Soviet Union. Currently, the richest collection of ticks is stored at the Department of Biology of the Military Medical Academy. C.M. Kirov, the permanent leader of which for over 40 years was E.N. Pavlovsky. The collection includes more than 15 thousand copies of arthropods. Among them are Ornithodorus papillitis, Ornithodorus tartakovsky, Ornithodorus lahorensis, Ornithodorus Verrucosus, Argas persicus, as well as some other carriers of human infectious diseases. The historical collection of ticks is considered as a unique resource for the study of infectious pathogens and their vectors using molecular genetic techniques. The preservation of genetic material in the museum samples of ticks was studied in order to determine the possibility of detecting in them deoxyribonucleotide markers of tick-borne pathogens (tick-borne infections).. Genetic markers of tick-borne infections were identified in 10 instances from of 48 ticks instances. The 8 samples were positive for the presence fragments of nucleic acids of tick-borne rickettsia (Rickettsia species). There were identified the genetic markers of causative agent Lyme disease (Borrelia burgdorferi s.l.) in one of the samples. In addition, the deoxyribonucleic acid fragments specific to Q-fever (Coxiella burnetii) were discovered in one case. The obtained data testify to the high scientific significance of the E.N. Pavlovsky collection in modern conveniences. The unique biological material can be used to study the structure and evolution of the genome of ticks Argasidae, as well as etiology and the spread of tick-borne infections.
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Klarenberg, Geraldine, and Samantha M. Wisely. "Evaluation of NEON Data to Model Spatio-Temporal Tick Dynamics in Florida." Insects 10, no. 10 (2019): 321. http://dx.doi.org/10.3390/insects10100321.
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In 2013, the National Ecological Observatory Network (NEON) started collecting 30-year multi-faceted ecological data at various spatial and temporal scales across the US including ticks. Understanding the abundance and dynamics of disease vectors under changing environmental conditions in the long-term is important to societies, but sustained long-term collection efforts are sparse. Using hard-bodied tick data collected by NEON, the vegetation and atmospheric data and a statistical state-space model, which included a detection probability component, this study estimated the abundance of tick nymphs and adult ticks across a Florida NEON location. It took into account the spatial and temporal variation, and factors affecting detection. Its purpose was to test the applicability of data collected thus far and evaluate tick abundance. The study found an increase in tick abundance at this Florida location, and was able to explain spatial and temporal variability in abundance and detection. This approach shows the potential of NEON data. The NEON data collection is unique in scale, and promises to be of great value to understand tick and disease dynamics across the US. From a public health perspective, the detection probability of vectors can be interpreted as the probability of encountering that vector, making these types of analyses useful for estimating disease risk.
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Misra, Brij Ranjan, Niraj Kumar, Rajni Kant, et al. "Abundance of Ticks (Acari: Ixodidae) and Presence of Rickettsia and Anaplasma in Ticks Infesting Domestic Animals From Northern India." Journal of Medical Entomology 58, no. 3 (2021): 1370–75. http://dx.doi.org/10.1093/jme/tjaa296.
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Abstract Rickettsia and Anaplasma are bacteria that can be transmitted by hematophagous arthropods such as ticks infesting animals in close proximity to humans. The main objective of the present study was to investigate abundance of common tick species infesting domestic animals and presence of Rickettsia and Anaplasma in tick populations. Adult ticks were collected from domestic animals in rural areas and screened by molecular detection of bacterial DNA for these two genera of bacteria. A total of 1,778 adult ixodid tick specimens were collected from 200 cattle, 200 buffaloes, 200 goats, and 40 dogs. The collection consisted of four species of ixodid ticks, Rhipicephalus (Boophilus) microplus (Canestrini) (83.8%), Hyalomma kumari (Sharif) (7.1%), Rhipicephalus sanguineus (Latreille) (6.4%), and Dermacentor auratus (Supino) (2.7%) infesting the domestic animals. The prevalence of all the collected tick species was highest in the month of October. Anaplasma spp. was the most frequently identified bacteria (3.3%) in tested ticks. Of 17 positive tick pools for Anaplasma spp., 14 pools were from ticks infesting cattle, 2 pools of ticks collected from buffalo, and the remaining pool were ticks infesting a goat at the time of collection. Although 1.6% tick pools of R. microplus collected from cattle tested positive for Rickettsia spp., present investigation provides evidence of the most prevalent ixodid ticks infesting domestic animals and the presence of obligate intracellular bacteria, Rickettsia and Anaplasma, in these ticks collected in the Gorakhpur division of Northern India.
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Krige, Anna-Sheree, Siew-May Loh, and Charlotte L. Oskam. "New host records for ticks (Acari : Ixodidae) from the echidna (Tachyglossus aculeatus) revealed in Australian museum survey." Australian Journal of Zoology 65, no. 6 (2017): 379. http://dx.doi.org/10.1071/zo18018.
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A nationwide survey was conducted for ticks (Ixodidae) removed from echidnas, Tachyglossus aculeatus (Shaw, 1792), that had been previously collected between 1928 and 2013, and archived within Australian national (Australian National Insect Collection, Australian Capital Territory) and state (Queensland, South Australia, Victoria, and Western Australia) natural history collections. A total of 850 ticks from 89 T. aculeatus hosts were morphologically identified to determine instar, sex and species. Seven larvae, 349 nymphs and 494 adults were identified; 235 were female and 259 were male. The most common tick species was Bothriocroton concolor (Neumann, 1899) (89.2%). In addition, ticks previously recorded from T. aculeatus were identified, including Amblyomma australiense Neumann, 1905 (1.8%), Amblyomma echidnae Roberts, 1953 (0.1%), Bothriocroton hydrosauri (Denny, 1843) (1.4%), Bothriocroton tachyglossi (Roberts, 1953) (1.5%) and Ixodes tasmani Neumann, 1899 (1.2%). For the first time, 22 Amblyomma fimbriatum Koch, 1844 (2.6%) and 19 Amblyomma triguttatum Koch, 1844 (2.2%) ticks were recorded from T. aculeatus. This is the first survey to utilise archived Australian tick collections for the purpose of acquiring new data on tick species that parasitise T. aculeatus.
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Cumming, G. S. "On the relevance of abundance and spatial pattern for interpretations of host–parasite association data." Bulletin of Entomological Research 94, no. 5 (2004): 401–9. http://dx.doi.org/10.1079/ber2004319.
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AbstractThe quantification of host–parasite associations from field data is a fundamental step towards understanding host–parasite and host-parasite–pathogen dynamics. For parasites that are not rigid host specialists, exemplified in this paper by ticks, the interpretation of host–parasite association data is difficult. Interpretations of tick collection records have largely assumed that off-host collection records offer a valid basis from which to make claims about the host specificity or generality of tick species. A simple simulation analysis of rudimentary tick–host interactions in a hypothetical 50 × 50-cell habitat demonstrates that perceptions of tick–host relationships can be strongly biased by spatial patterns. Regardless of their true level of host specificity or generality, it seems that: (i) more abundant ticks will be perceived as generalists, while rarer species will be considered specialists; and (ii) tick species that have patchy, strongly aggregated distributions will be more likely to be perceived as host specialists than species that have more dispersed or uniform distributions. Since all available evidence suggests that abundances and spatial patterns vary between tick species, there is no way of assessing the true validity of claims about host specificity without first undertaking detailed research on the relative abundances and spatial and temporal patterns of both tick and host distributions.
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Lemma, Seifu, and Alemayeh Redii. "PREVALENCE OF TICK AND MANGE MITES’ INFESTATION IN GOATS IN BENATSEMAY DISTRICT OF SOUTH OMO ZONE, ETHIOPIA." International Journal of Research -GRANTHAALAYAH 7, no. 8 (2019): 111–18. http://dx.doi.org/10.29121/granthaalayah.v7.i8.2019.644.
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Across sectional, study of tick was conducted to identify types of tick species and determine the Prevalence of tick and mange mites infestation in small ruminants in Benatsemayworeda, South Omozone, Southern Nation Nationality of Ethiopia. Collection and identification of the ticks and mange mites were undertaken from June 6----- /15/ 2019. The overall prevalence of tick and mange mites infestation in the study area was 172 (40.66%) All visible individual adult ticks were collected from the body of 172 goats. The prevalence of tickand mange mites infestation in goats was found to be (40.66%). In this study, one/ species of ticks, which grouped under one genus, was identified. The most abundant species found in this study were Rhipicephalus/pulchellus, eversi, simus, B(decoloratus) and psoroptics mites.
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Ahmed, Jafer, Danel Wendemagegn, Abraham Tsehay, Samson Silesh, and Henok Abebe. "PREVALENCE OF TICK INFESTATION ON SMALL RUMINANTS IN AND AROUND DIRE DAWA, EASTERN ETHIOPIA." International Journal of Research -GRANTHAALAYAH 5, no. 5 (2017): 326–36. http://dx.doi.org/10.29121/granthaalayah.v5.i5.2017.1864.
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Across section, study of tick was conducted to identify types of tick species and determine the Prevalence of tick infestation in small ruminants in and around Dire Dawa Administrative council, Eastern Ethiopia. Collection and identification of the ticks were undertaken from November 2014 to May 2015. The overall prevalence of tick infestation in the study area was 278 (72.39% /384). All visible individual adult ticks were collected from the body of 196 goats and 188 sheep. The prevalence of tick infestation in goats and sheep was found to be 73.9% and 70.7%, respectively. In this study, eight species of ticks, which grouped under four genera, were identified. The most abundant species found in this study were Rhipicephalus pulchellus (34.1%), Amblyomma variegatum (24.5%), Rhipicephalus evertsievertsi (22.1%), Hyalomma truncatum (15.6%), Hyalomma marginatum rufipes (12.2%) and Amblyomma gemma (10.9 according to predominance. Hyalomma dromedari (4.2%) and Boophilus decoloratus was the minor species observed on both goats and sheep in the study area. The difference in prevalence of tick infestation was found statistically significant variation (P < 0.05) between the sex, age exception of Boophilus decoloratus and Hyalomma dromedari in all cases male ticks dominated females.
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Porter, W. Tanner, Zachary A. Barrand, Julie Wachara, et al. "Predicting the current and future distribution of the western black-legged tick, Ixodes pacificus, across the Western US using citizen science collections." PLOS ONE 16, no. 1 (2021): e0244754. http://dx.doi.org/10.1371/journal.pone.0244754.
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In the twenty-first century, ticks and tick-borne diseases have expanded their ranges and impact across the US. With this spread, it has become vital to monitor vector and disease distributions, as these shifts have public health implications. Typically, tick-borne disease surveillance (e.g., Lyme disease) is passive and relies on case reports, while disease risk is calculated using active surveillance, where researchers collect ticks from the environment. Case reports provide the basis for estimating the number of cases; however, they provide minimal information on vector population or pathogen dynamics. Active surveillance monitors ticks and sylvatic pathogens at local scales, but it is resource-intensive. As a result, data are often sparse and aggregated across time and space to increase statistical power to model or identify range changes. Engaging public participation in surveillance efforts allows spatially and temporally diverse samples to be collected with minimal effort. These citizen-driven tick collections have the potential to provide a powerful tool for tracking vector and pathogen changes. We used MaxEnt species distribution models to predict the current and future distribution of Ixodes pacificus across the Western US through the use of a nationwide citizen science tick collection program. Here, we present niche models produced through citizen science tick collections over two years. Despite obvious limitations with citizen science collections, the models are consistent with previously-predicted species ranges in California that utilized more than thirty years of traditional surveillance data. Additionally, citizen science allows for an expanded understanding of I. pacificus distribution in Oregon and Washington. With the potential for rapid environmental changes instigated by a burgeoning human population and rapid climate change, the development of tools, concepts, and methodologies that provide rapid, current, and accurate assessment of important ecological qualities will be invaluable for monitoring and predicting disease across time and space.
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Subotina, I., A. Osmolovsky, and E. Fadeenkova. "Tick-born infections and invasions in the Republic of Belarus." Naukovij vìsnik veterinarnoï medicini, no. 2(160) (November 24, 2020): 56–64. http://dx.doi.org/10.33245/2310-4902-2020-160-2-56-64.
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On the territory of the Republic of Belarus, the growth of infectious and invasive diseases of humans and animals, caused by ticks and insects, continues. The study of the ecological, logistic and phenological patterns of ontogenesis of ixodid ticks in different climatic zones of the Republic of Belarus, the development of various methods for monitoring and predicting the number, timing of the increase in the population and the increase in the activity of ixodids seems relevant.The purpose of the study was to analyze the features of the distribution, species composition and seasonality of the attack of ixodid ticks in different climatic zones of the Republic of Belarus over the past 5 years. To determine the seasonal activity of ticks and the seasonality of a number of tick-borne infections and infestations among animals, both our own research on the collection of ticks, the selection and examination of blood (blood smears), and the collection of reporting data from veterinary clinics (private and public), data from regional veterinary stations, reporting Ministry of Health data for 2016–2020 to study the features of seasonal dynamics and climatic-geographical features of the distribution of both tick-carriers themselves and tick-borne infections and invasions among animals and the population. The data on the distribution, species composition and seasonality of the attack of ixodid ticks in different climatic zones of the Republic of Belarus are analyzed. A tendency is shown to change the season of tick activity and the seasonality of tick-borne infections and invasions towards their registration throughout the year (all seasons of the year). A change in the habitat of ticks and their wide distribution in the urban area were revealed. An increase in the number of registered cases of seasonal invasions and infections, both among the population and among domestic animals, has been established. Key words: ixodid mites, tick infections, invasion, animals, population, the Republic of Belarus.
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Cumming, G. S. "Host preference in African ticks (Acari: Ixodida): a quantitative data set." Bulletin of Entomological Research 88, no. 4 (1998): 379–406. http://dx.doi.org/10.1017/s0007485300042139.
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AbstractDespite the large number of collection rocords available, there has recently been some debate concerning how host-specific ticks are. A quantitative data set is presented for the host preferences of African ticks. The results are based on 43,615 individual collection records from published sources covering most countries in mainland Africa. Out of 223 ticks species, 112 have been collected 20 times or more; 14 of these are generalists and at least 39 are potential specialists. Further collections are needed for greater clarity in many cases. It is important that people working on problems that relate to tick-host interactions are aware of the context in which these occur, lest they make false a prior hypotheses about the importance of hosts or parasites in the system.
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Reye, Anna L., Judith M. Hübschen, Aurélie Sausy, and Claude P. Muller. "Prevalence and Seasonality of Tick-Borne Pathogens in Questing Ixodes ricinus Ticks from Luxembourg." Applied and Environmental Microbiology 76, no. 9 (2010): 2923–31. http://dx.doi.org/10.1128/aem.03061-09.
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ABSTRACT In Europe, ixodid ticks are important arthropod vectors of human and animal pathogens, but comprehensive studies of the prevalence of all relevant pathogens in Central Europe are scarce. As a result of ecological changes, the incidences of tick-borne infections are expected to increase. In this study, 1,394 nymphal and adult Ixodes ricinus ticks sampled monthly during the active season from 33 ecologically distinct collection sites throughout Luxembourg were screened for all human tick-borne pathogens relevant in Central Europe. Species were identified by sequence analysis of detection PCR amplicons. Mean infection rates of ticks were 11.3% for Borrelia burgdorferi sensu lato, 5.1% for Rickettsia sp., 2.7% for Babesia sp., and 1.9% for Anaplasma phagocytophilum. No tick was found to be infected with Coxiella sp., Francisella tularensis subsp., or Tick-borne encephalitis virus (TBEV). A total of 3.2% of ticks were infected with more than one pathogen species, including mixed Borrelia infections (1.5%). Seasonal variations of tick infection rates were observed for Borrelia, Babesia, and Anaplasma, possibly reflecting a behavioral adaptation strategy of questing ticks. A positive correlation between the grade of urbanization and Borrelia infection rate of ticks was observed, suggesting an established urban zoonotic cycle. We also found Hepatozoon canis (0.1%) and Bartonella henselae (0.3%), which so far have not been found in questing Ixodes ricinus ticks in Central Europe.
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Cumming, G. S. "Host distributions do not limit the species ranges of most African ticks (Acari: Ixodida)." Bulletin of Entomological Research 89, no. 4 (1999): 303–27. http://dx.doi.org/10.1017/s0007485399000450.
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AbstractThe factors that set broad-scale limits on the species ranges of ticks have not been clearly defined, despite their potential importance for the study and control of ticks. A database of 33,989 published collection records for African ticks is used to test the hypothesis that the outer limits to tick species ranges are determined by the distributions of their hosts. Distribution maps for many of the more economically important tick species are given. Direct comparisons of the known ranges of ticks and their hosts show that the hypothesis of a host-determined species range is supported for only one tick species, Amblyomma rhinocerotis (de Geer), which has been constrained by the near-eradication of its rhinoceros hosts. At least 97 other species are not host-limited; the quality of available host-use and distribution information is insufficient to draw strong conclusions about the (approximately) 132 remaining species. In general, the boundaries to tick species ranges are more likely to be set by factors such as vegetation and climate.
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Osbrink, Weste L. A., Allan T. Showler, Veronica Abrigo, and Adalberto A. Pérez de León. "Rhipicephalus (Boophilus) microplus (Ixodida: Ixodidae) Larvae Collected From Vegetation in the Coastal Wildlife Corridor of Southern Texas and Research Solutions for Integrated Eradication." Journal of Medical Entomology 57, no. 4 (2020): 1305–9. http://dx.doi.org/10.1093/jme/tjaa002.
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Abstract The potential for reinvasion of the United States by cattle fever ticks, Rhipicephalus (Boophilus) annulatus and Rhipicephalus microplus (Canestrini), which remain established in Mexico, threatens the viability of the domestic livestock industry because these ticks vector the causal agents (Babesia bovis and Babesia bigemina) of bovine babesiosis. The Cattle Fever Tick Eradication Program safeguards the health of the national cattle herd preventing the reemergence of bovine babesiosis by keeping the United States free of cattle fever ticks. Here, the collection of free-living southern cattle tick, R. microplus, larvae by sweeping flannel flags over vegetation in the wildlife corridor of Cameron and Willacy Counties, TX, is reported. Finding R. microplus larvae on vegetation complements reports of infestations in wildlife hosts inhabiting the southern Texas coastal plains. Land uses and environmental conditions have changed since cattle fever ticks were eradicated from the United States by 1943. These changes complicate efforts by the Cattle Fever Tick Eradication Program to keep cattle in the United States free of the cattle fever tick disease vectors. Current scientific research on technologies that could be used for area-wide management of fever tick larvae in south Texas and how this could be applied to integrated eradication efforts are discussed.
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Scott, John D., and Lance A. Durden. "Songbird-transported tick Ixodes minor (Ixodida: Ixodidae) discovered in Canada." Canadian Entomologist 147, no. 1 (2014): 46–50. http://dx.doi.org/10.4039/tce.2014.34.
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AbstractTicks are carried into Canada by millions of birds during spring migration, and some of these blood-sucking ectoparasites harbour tick-associated pathogens. During a pan-Canadian study of ticks on avian hosts, we identified an extralimital tick, Ixodes minor Neumann (Ixodida: Ixodidae) collected from a Common Yellowthroat, Geothlypis trichas (Linnaeus) (Passeriformes: Parulidae) at Toronto, Ontario, Canada. Although the I. minor larva was not tested for any tick-borne pathogens, this tick species is considered a competent enzootic vector of the Lyme disease spirochete, Borrelia burgdorferi Johnson, Schmid, Hyde, Steigerwalt, and Brenner sensu lato (s.l.). Epidemiologically, diverse B. burgdorferi s.l. genospecies have been detected in, or isolated from I. minor, and this tick species potentially represents a public health risk not only in the southeastern United States of America, where I. minor is indigenous, but also in Canada. This tick collection is the northernmost report of I. minor in North America, and constitutes the first documentation of this tick species in Canada.
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Larson, R. T., G. M. Bron, X. Lee, and S. M. Paskewitz. "High Proportion of Unfed Larval Blacklegged Ticks, Ixodes scapularis (Acari: Ixodidae), Collected From Modified Nest Boxes for Mice." Journal of Medical Entomology 58, no. 3 (2021): 1448–53. http://dx.doi.org/10.1093/jme/tjaa287.
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Abstract The blacklegged tick, Ixodes scapularis Say, is the primary vector of several tick-borne pathogens, including those causing Lyme disease and babesiosis, in the eastern United States and active collection methods for this species include dragging or wild animal sampling. Nest boxes targeting mice may be an alternative strategy for the surveillance and collection of immature I. scapularis feeding on these hosts and would be much safer for animals compared to small mammal trapping. We constructed double-walled insulated nest boxes (DWINs) with collection tubes mounted below the nesting chamber and deployed eleven in southern Wisconsin from June until September of 2020. The DWINs were occupied by Peromyscus spp. and birds (wren species, Troglodytidae family). We collected 192 ticks from collection tubes, all of which were identified as either I. scapularis (95%) or Dermacentor variabilis Say (Acari: Ixodidae) (5%). Only 12% (21/182) and 20% (2/10) of I. scapularis and D. variabilis were blood-fed, respectively. The high proportion of unfed ticks found in collection tubes may be due to grooming by hosts inside the nest boxes. Alternatively, immature ticks may have climbed trees and entered the DWIN seeking a host. Results suggest that nest boxes could be a tool for finding ticks in areas of low density or at the leading edge of invasion, when small mammal trapping or drag sampling is not feasible.
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DANTAS-TORRES, FILIPE, FILIPE MARTINS ALÉSSIO, DANIEL BARRETO SIQUEIRA, et al. "Exposure of small mammals to ticks and rickettsiae in Atlantic Forest patches in the metropolitan area of Recife, North-eastern Brazil." Parasitology 139, no. 1 (2012): 83–91. http://dx.doi.org/10.1017/s0031182011001740.
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SUMMARYBetween December 2007 and March 2009, small mammals were captured in 6 Atlantic Forest patches in Brazil. We assessed tick-host associations and whether they differ among forest strata, sites, seasons, and host age classes or between sexes. Moreover, we assessed the exposure of animals to Rickettsia spp. In total, 432 animals were captured and 808 ticks were found on 32·9% of them. Significant differences were found among host species, collection sites, and forest strata; microhabitat preference was a strong risk factor for tick infestation. The highest tick density rates were recorded in forest fragments settled in rural areas; 91·3% of the ticks were collected from animals trapped in these forest fragments. A high prevalence (68·8%) of antibodies to Rickettsia spp. was detected among animals. This study suggests that disturbed Atlantic Forest fragments provide an environment for ticks and small mammals, which are highly exposed to rickettsiae. It also indicates that forest patches settled in rural areas are usually associated with higher small mammal diversity as well as with higher tick density rates.
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Lehane, Aine, Christina Parise, Colleen Evans, Lorenza Beati, William L. Nicholson, and Rebecca J. Eisen. "Reported County-Level Distribution of the American Dog Tick (Acari: Ixodidae) in the Contiguous United States." Journal of Medical Entomology 57, no. 1 (2019): 131–55. http://dx.doi.org/10.1093/jme/tjz119.
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Abstract In the United States, tick-borne diseases are increasing in incidence and cases are reported over an expanding geographical area. Avoiding tick bites is a key strategy in tick-borne disease prevention, and this requires current and accurate information on where humans are at risk for exposure to ticks. Based on a review of published literature and records in the U.S. National Tick Collection and National Ecological Observatory Network databases, we compiled an updated county-level map showing the reported distribution of the American dog tick, Dermacentor variabilis (Say). We show that this vector of the bacterial agents causing Rocky Mountain spotted fever and tularemia is widely distributed, with records derived from 45 states across the contiguous United States. However, within these states, county-level records of established tick populations are limited. Relative to the range of suitable habitat for this tick, our data imply that D. variabilis is currently underreported in the peer-reviewed literature, highlighting a need for improved surveillance and documentation of existing tick records.
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Rubel, Franz, Katharina Brugger, Lidia Chitimia-Dobler, Hans Dautel, Elisabeth Meyer-Kayser, and Olaf Kahl. "Atlas of ticks (Acari: Argasidae, Ixodidae) in Germany." Experimental and Applied Acarology 84, no. 1 (2021): 183–214. http://dx.doi.org/10.1007/s10493-021-00619-1.
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AbstractAn updated and increased compilation of georeferenced tick locations in Germany is presented here. This data collection extends the dataset published some years ago by another 1448 new tick locations, 900 locations of which were digitized from literature and 548 locations are published here for the first time. This means that a total of 3492 georeferenced tick locations is now available for Germany. The tick fauna of Germany includes two species of Argasidae in the genera Argas and Carios and 19 species of Ixodidae in the genera Dermacentor, Haemaphysalis, and Ixodes, altogether 21 tick species. In addition, three species of Ixodidae in the genera Hyalomma (each spring imported by migratory birds) and Rhipicephalus (occasionally imported by dogs returning from abroad with their owners) are included in the tick atlas. Of these, the georeferenced locations of 23 tick species are depicted in maps. The occurrence of the one remaining tick species, the recently described Ixodes inopinatus, is given at the level of the federal states. The most common and widespread tick species is Ixodes ricinus, with records in all 16 federal states. With the exception of Hamburg, Dermacentor reticulatus was also found in all federal states. The occurrence of the ixodid ticks Ixodes canisuga, Ixodes frontalis, Ixodes hexagonus and I. inopinatus were documented in at least 11 federal states each. The two mentioned argasid tick species were also documented in numerous federal states, the pigeon tick Argas reflexus in 11 and the bat tick Carios vespertilionis in seven federal states. The atlas of ticks in Germany and the underlying digital dataset in the supplement can be used to improve global tick maps or to study the effects of climate change and habitat alteration on the distribution of tick species.
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Elhachimi, Latifa, Félix Valcárcel, Angeles S. Olmeda, et al. "Rearing of Hyalomma marginatum (Acarina: Ixodidae) under laboratory conditions in Morocco." Experimental and Applied Acarology 84, no. 4 (2021): 785–94. http://dx.doi.org/10.1007/s10493-021-00641-3.
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AbstractHyalomma marginatum Koch is one of the main tick vectors of human and animal tick-borne diseases. The objective of this study was to establish standard procedures for rearing H. marginatum under laboratory conditions. Such laboratory tick populations are required to study acaricide resistance of Hyalomma ticks. In our rearing program, larvae and nymphs were fed on New Zealand white rabbits, whereas adults were fed on sheep. Non-parasitic stages were held at 18 and 28 °C to study the effect of temperature on development and survival. In our experiments, H. marginatum ticks have maintained the characteristics of a two-host life cycle. The engorged larvae did not detach and moulted on the rabbit, after which the emerged nymphs continued to feed on the same animal. The life cycle duration of H. marginatum was influenced by temperature, with each non-parasitic stage—i.e., larva and nymph molting—developing faster at 28 than at 18 °C; preoviposition and oviposition periods were shorter at 28 than at 18 °C. At 18 °C, no eggs hatched. The whole cycle from the collection of an engorged field tick until the emergence of second-generation larvae took 189 days. One such tick on average results in 3500 eggs which over time, taking into account the losses at each developmental stage, develop into 1200 adult ticks. Rearing these ticks a second generation therefore could result in millions of larval ticks.
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Mao, Jean-Jay, Gerrut Norval, Richard G. Robbins, and Siew Te Wong. "An instance of Boiga dendrophila dendrophila (Boie, 1827) (Reptilia: Colubridae) being parasitized by Amblyomma helvolum Koch, 1844 (Acari: Ixodidae), with comments about the attachment sites of this tick species." Acarologia 59, no. 1 (2019): 115–19. http://dx.doi.org/10.24349/acarologia/20194316.
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Ectoparasites, such as ticks, may exhibit preferences for particular attachment sites on various hosts, since the choice of attachment sites may affect tick survival. Herein we report an instance of a mangrove snake, Boiga dendrophila dendrophila, being parasitized by the tick Amblyomma helvolum, with comments on this tick’s attachment sites. Our collection of A. helvolum appears to be the first record of this species from Sandakan, a city on the northeast coast of Borneo, in the Malaysian state of Sabah.
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Mertins, James W., Arnold S. Moorhouse, Jeffery T. Alfred, and H. Joel Hutcheson. "Amblyomma triste (Acari: Ixodidae): New North American Collection Records, Including the First From the United States." Journal of Medical Entomology 47, no. 4 (2010): 536–42. http://dx.doi.org/10.1093/jmedent/47.4.536.
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Abstract New distribution records for the Neotropical tick, Amblyomma triste Koch, are identified from 27 specimens in 18 separate collections. These collections originated from six now recognized geographical foci in two states in the United States (Cochise and Santa Cruz Counties, Arizona, and Brewster and Jeff Davis Counties, Texas) and from import cattle, Bos taurus L., presented for entry at the United States border and originating in three Mexican states (Coahuila, Durango, and Sonora). For at least 67 yr, A. triste has existed in some areas of the United States as a cryptic species, and specimens there have been confused with and identified as Gulf Coast ticks, Amblyomma maculatum Koch, even by noted tick specialists. Most of the records reported in this study were from reidentified, archived specimens of putative A. maculatum.
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Barashkova, A. I., A. D. Reshetnikov, and E. N. Popov. "Identification and molecular analysis of ixodid ticks (Acari: Ixodidae) and their pathogens in Yakutia." Russian Journal of Parasitology 15, no. 3 (2021): 17–22. http://dx.doi.org/10.31016/1998-8435-2021-15-3-17-22.
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The purpose of the research is to identify ixodid ticks and their pathogens in the left bank area of Central Yakutia. Materials and methods. The work was carried out in 2019–2020 in the left bank area of Central Yakutia. Nine ticks were collected in 2019, and 27 ticks in 2020. We studied forest shrub stations, steppe stations, meadow field stations, near-water stations and stations of settlements. To determine faunal and ecological characteristics of ectoparasites in the territory, we used standard collection methods. The tick species was determined using morphological keys by N. A. Filippova; the determination correctness was confirmed by the PCR method. The collected ticks were studied for causative agents of babesiosis and tick-borne viral encephalitis using PCR analysis. Results and discussion. One species of ixodid ticks, Ixodes persulcatus, inhabits the left bank area of Central Yakutia. Haemaphysalis concinna was not found in Yakutia. In 2008, a natural focus of blood protozoan disease of domestic reindeer appeared for the first time in Yakutia in its central zone. Recently, an increase in the number of I. persulcatus has been observed. Tick activity is recorded from the second decade of May to the second decade of August. The ground-squirrel Spermophilus parryii is the main host for the preimaginal stages. Pathogens were not detected when ticks were examined for causative agents of babesiosis and tick-borne viral encephalitis using PCR analysisd.
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Ntiamoa-Baidu, Y., C. Carr-Saunders, B. E. Matthews, P. M. Preston, and A. R. Walker. "An updated list of the ticks of Ghana and an assessment of the distribution of the ticks of Ghanaian wild mammals in different vegetation zones." Bulletin of Entomological Research 94, no. 3 (2004): 245–60. http://dx.doi.org/10.1079/ber2004302.
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AbstractTwenty one species of ticks belonging to five genera of the family Ixodidae (Order Acari, sub-order Ixodida) – Amblyomma, Haemaphysalis, Hyalomma, Ixodes and Rhipicephalus (including the sub-genus Rhipicephalus (Boophilus)) – were collected from 1260 mammals, representing 29 species, 14 families and 6 orders, in four vegetation zones in Ghana during the period 1971–1978. Four other species were collected from humans in 1977. In all, eight species appeared to be new records for Ghana: Amblyomma tholloni Neumann; Dermacentor circumguttatus Neumann; Haemaphysalis houyi Nuttall & Warburton; Ixodes loveridgei Arthur; Ixodes oldi Nuttall; Ixodes vanidicus Schultze; Rhipicephalus complanatus Neumann; Rhipicephalus cuspidatus Neumann. The updated list of tick species in Ghana given here includes 41 species of ixodid ticks and four species of argasid ticks. Most species have been found in neighbouring regions of West Africa but 56 of the 121 different combinations of ixodid tick species and host species found in the collection described here have not apparently been reported before. The new combinations recorded here bring the total number of different combinations of ixodid tick species and mammalian host species now reported in Ghana to 151. The tick species found on wild mammals in Ghana mostly differed from those reported from domestic stock by other authors. The data showed that different tick species occurred in different vegetation zones and that most species displayed a pronounced preference for certain groups of related host species. Some tick species were found in the savanna feeding mainly on large bovids and/or suids; others were found in forests feeding mainly on small bovids, large rodents or small carnivores.
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MONELLO, R. J., and M. E. GOMPPER. "Biotic and abiotic predictors of tick (Dermacentor variabilis) abundance and engorgement on free-ranging raccoons (Procyon lotor)." Parasitology 134, no. 14 (2007): 2053–62. http://dx.doi.org/10.1017/s0031182007003423.
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SUMMARYWe examined the relative importance of abiotic and biotic factors on the ability of adultDermacentor variabilisticks to attach and engorge with blood across 10 populations of free-ranging raccoons (Procyon lotor). We developeda priorimodels that represented explicit hypotheses based on the literature and tested the ability of these models to explain non-replete and replete (fully engorged with blood) tick infestation using generalized linear models and Akaike's Information Criterion. Abiotic models that included month and site of collection clearly provided a better fit for non-replete tick abundance data, while biotic models with host age and sex covariates best fit the replete tick data. Abiotic models of non-replete abundance were superior to biotic models because of large seasonal and site fluctuations in non-replete abundance that masked differences due to host characteristics. Conversely, best-fitting models of replete tick abundance included only age and sex and suggest that once a tick has reached a host, host-parasite interactions are the primary determinant of engorgement by female ticks. Host population structure may have a large influence on potential cohort size of ticks by reducing or increasing the total number and proportion that can become engorged and moult or lay eggs.
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KOFFI, J. K., J. SAVAGE, K. THIVIERGE, et al. "Evaluating the submission of digital images as a method of surveillance for Ixodes scapularis ticks." Parasitology 144, no. 7 (2017): 877–83. http://dx.doi.org/10.1017/s0031182017000117.
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SUMMARYWidespread access to the internet is offering new possibilities for data collection in surveillance. We explore, in this study, the possibility of using an electronic tool to monitor occurrence of the tick vector of Lyme disease, Ixodes scapularis. The study aimed to compare the capacity for ticks to be identified in web-based submissions of digital images/photographs, to the traditional specimen-based identification method used by the provincial public health laboratory in Quebec, Canada. Forty-one veterinary clinics participated in the study by submitting digital images of ticks collected from pets via a website for image-based identification by an entomologist. The tick specimens were then sent to the provincial public health laboratory to be identified by the ‘gold standard’ method using a microscope. Of the images submitted online, 74·3% (284/382) were considered of high-enough quality to allow identification. The laboratory identified 382 tick specimens from seven different species, with I. scapularis representing 76% of the total submissions. Of the 284 ticks suitable for image-based species identification, 276 (97·2%) were correctly identified (Kappa statistic of 0·92, Z = 15·46, P < 0·001). This study demonstrates that image-based tick identification may be an accurate and useful method of detecting ticks for surveillance when images are of suitable quality.
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Tian, Yuexun, Cynthia Lord, and Phillip E. Kaufman. "Brown Dog Tick Rhipicephalus sanguineus Latreille (Arachnida: Acari: Ixodidae)." EDIS 2020, no. 2 (2020): 6. http://dx.doi.org/10.32473/edis-in378-2020.
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The brown dog tick is unusual among ticks in that it can complete its entire life cycle indoors as well as outdoors. Brown dog tick infestations can develop in dog kennels and residences, where populations can reach dramatic levels and cause dog diseases. This 6-page fact sheet written by and published by the UF/IFAS provides the distribution, description and identification, life cycle, and management of the brown dog tick as well as its hosts and the medical and veterinary significance of this troublesome pest. https://edis.ifas.ufl.edu/in378
 
 This article is co-published with the Featured Creatures collection of UF/IFAS Department of Entomology & Nematology, and FDACS/DPI, available at http://entnemdept.ufl.edu/creatures/urban/medical/brown_dog_tick.htm
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Trout Fryxell, R. T., and J. T. Vogt. "Collaborative-Tick Surveillance Works: An Academic and Government Partnership for Tick Surveillance in the Southeastern United States (Acari: Ixodidae)." Journal of Medical Entomology 56, no. 5 (2019): 1411–19. http://dx.doi.org/10.1093/jme/tjz055.
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Abstract Tick surveillance provides essential information on distributions and encounter frequencies; it is a component of operational activities in public health practice. Our research objectives were a proof-of-concept for collaborative surveillance, which involved establishing an academic and government partnership to enhance tick surveillance efforts. The University of Tennessee (UT) collaborated with United States Department of Agriculture Forest Service, Southern Research Station Forest Inventory Analysis (FIA) in an Occupational Health and Safety partnership. UT provided FIA crews in the southeastern United States with vials containing 80% ethanol (July 2014–November 2017). Crew members were instructed to put all encountered ticks into the vials and return them to FIA headquarters. UT identified all submitted ticks to species and life stage, and screened Amblyomma americanum (L.) for Ehrlichia bacteria using a nested-PCR assay. From the 198 returned vials, 1,180 ticks were submitted, including A. americanum (90.51%; 202 larvae, 503 nymphs, and 363 adults), Dermacentor variabilis Say (7.12%; 1 nymph, 83 adults), Ixodes scapularis (Say) (1.61%; 19 adults), Amblyomma maculatum Koch (0.59%; 1 nymph, 6 adults), and Amblyomma cajennense (Fabricius) (0.17%; 1 nymph, 1 adult). FIA crews encountered A. americanum with Ehrlichia and collection information was used to generate baseline occurrence data of tick encounters. Results indicate that this collaborative-tick surveillance can be improved and used to generate useful data including pathogen detection, and because crews revisit these sites, changes in tick encounters can be monitored.
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Simmons, Thomas W., Emily N. Welch, Anna B. Manges, Nathan A. Peters, and Joseph E. Duchamp. "Relative Efficiency of Drag Fabrics for Collection of Blacklegged Tick (Acari: Ixodidae) Larvae, Nymphs, and Adults." Journal of Medical Entomology 58, no. 3 (2021): 1248–55. http://dx.doi.org/10.1093/jme/tjab002.
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Abstract The blacklegged tick (Ixodes scapularis Say) vectors several bacterial, protozoan, and viral human pathogens. The known distribution, abundance, and phenology of I. scapularis within its estimated range are incomplete. This gap in knowledge is problematic because these factors are important for determining acarological risk of exposure to infected ticks. Consequently, enhanced surveillance of I. scapularis is being promoted and supported in the United States. Although the most common method for collecting I. scapularis is by dragging a sturdy cloth along the ground, there are no published empirical data showing which drag fabric is most effective. We used a randomized block design to directly compare the relative efficiencies of canvas, corduroy, and flannel drags for the collection of larval, nymphal, and adult I. scapularis. Overall, flannel was the most effective fabric and canvas was the least effective. Significantly more adults were collected on flannel than on canvas or corduroy, and the same number of nymphs was collected on flannel and corduroy. Significantly more larvae were collected on flannel than on canvas, but one-third of larvae could not be removed from the former fabric by lint-rolling, and handpicking was difficult. Our findings support the use of flannel drags to maximize sampling effort for collection of I. scapularis, especially adults to determine the presence of ticks and tick-borne pathogens when density and infection prevalence are low, with the caveat that detection and removal of larvae are time-consuming.
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Nikitin, A. Ya, Yu A. Kozlova, and T. S. Panova. "Analysis of Variability of Morphologic Characteristics with Alternative Variation in Imago of Taiga Tick in the Territory of the Irkutsk Region." Problems of Particularly Dangerous Infections, no. 1(99) (February 20, 2009): 28–30. http://dx.doi.org/10.21055/0370-1069-2009-1(99)-28-30.
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Investigation of the spatial-temporal variability of characteristics with alternative variation in females of taiga tick from three district of the Irkutsk Region showed all samplings to be phenotypically heterogenous. Based on these results estimated was L.A.Zhivotovsky criterion of identity between separate imago collections. Similarity index for geographically remote populations was about 0.9. This index was higher in intrapopulational groups collected from one territory in different seasons. The elucidated variability creates the basis for selection of morphologic tags of vector transmitting capacity and ticks life cycle duration and other questions of their biology investigation which includes usage of collection materials accumulated previously.
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Dantas-Torres, Filipe, Riccardo Paolo Lia, Gioia Capelli, and Domenico Otranto. "Efficiency of flagging and dragging for tick collection." Experimental and Applied Acarology 61, no. 1 (2013): 119–27. http://dx.doi.org/10.1007/s10493-013-9671-0.
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Hahn, Micah B., Gale Disler, Lance A. Durden, et al. "Establishing a baseline for tick surveillance in Alaska: Tick collection records from 1909-2019." Ticks and Tick-borne Diseases 11, no. 5 (2020): 101495. http://dx.doi.org/10.1016/j.ttbdis.2020.101495.
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Lippi, Catherine A., Holly D. Gaff, Alexis L. White, and Sadie J. Ryan. "Scoping review of distribution models for selected Amblyomma ticks and rickettsial group pathogens." PeerJ 9 (February 17, 2021): e10596. http://dx.doi.org/10.7717/peerj.10596.
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The rising prevalence of tick-borne diseases in humans in recent decades has called attention to the need for more information on geographic risk for public health planning. Species distribution models (SDMs) are an increasingly utilized method of constructing potential geographic ranges. There are many knowledge gaps in our understanding of risk of exposure to tick-borne pathogens, particularly for those in the rickettsial group. Here, we conducted a systematic scoping review of the SDM literature for rickettsial pathogens and tick vectors in the genus Amblyomma. Of the 174 reviewed articles, only 24 studies used SDMs to estimate the potential extent of vector and/or pathogen ranges. The majority of studies (79%) estimated only tick distributions using vector presence as a proxy for pathogen exposure. Studies were conducted at different scales and across multiple continents. Few studies undertook original data collection, and SDMs were mostly built with presence-only datasets from public database or surveillance sources. The reliance on existing data sources, using ticks as a proxy for disease risk, may simply reflect a lag in new data acquisition and a thorough understanding of the tick-pathogen ecology involved.
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Dernat, Sylvain, and François Johany. "Tick Bite Risk as a Socio-Spatial Representation—An Exploratory Study in Massif Central, France." Land 8, no. 3 (2019): 46. http://dx.doi.org/10.3390/land8030046.
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Ticks are responsible for the largest number of transmissions of vector-borne diseases in the northern hemisphere, which makes the risk from tick bites a serious public health problem. Biological scientific research and prevention studies are important, but they have not focused on the population’s perception of tick bite risk, especially at a spatial level. This exploratory article sets out to study this point through an innovative methodology involving the collection of 133 mental maps associated with a semi-structured interview and a socio-demographic questionnaire collected in the Massif Central region, France. The results show a strong link between the representation of the tick bite risk and the representation of particular landscapes. Forests appear as dangerous for the population, especially in the traditional activities of family walking or hiking. This calls into question overly anxiogenic prevention approaches that neglect the impact on practices in risk-prone spaces. It accentuates the need for localized education measure to improve knowledge about tick biology and avoid stereotypical and unnecessary negative representations associated with the environment.
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Bonnet, S., J. de la Fuente, P. Nicollet, et al. "Prevalence of Tick-Borne Pathogens in AdultDermacentorspp. Ticks from Nine Collection Sites in France." Vector-Borne and Zoonotic Diseases 13, no. 4 (2013): 226–36. http://dx.doi.org/10.1089/vbz.2011.0933.
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Vogt, J. T., B. D. Allen, D. Paulsen, and R. T. Trout Fryxell. "A Unique Academic–Government Collaboration Yields First Report of Detailed Habitat Description for Haemaphysalis longicornis (Ixodida: Ixodidae) in Madison County, KY." Journal of Medical Entomology 58, no. 4 (2021): 1970–72. http://dx.doi.org/10.1093/jme/tjab061.
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Abstract Haemaphysalis longicornis Neumann, Asian longhorned tick, was collected in Madison County, Kentucky, United States as part of an ongoing collaborative-tick surveillance project. This is the first collection of this invasive tick that includes ancillary data on habitat and landscape features derived from the USDA Forest Service, Forest Inventory and Analysis program.
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Glass, Ganser, Wisely, and Kessler. "Standardized Ixodid Tick Survey in Mainland Florida." Insects 10, no. 8 (2019): 235. http://dx.doi.org/10.3390/insects10080235.
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A statewide survey of questing ixodid ticks in mainland Florida was developed consistent with U.S. CDC standards to maximize the amount of epidemiologic and environmental data gathered. Survey sites were stratified by climatic zones and proportional to recognized land cover categories. A total of 560 transects on 41 sites within the state were sampled repeatedly by flagging between 2015 and 2018. Four tick species were collected; Amblyomma americanum, Amblyomma maculatum, Ixodes scapularis and Dermacentor variabilis. All species were more commonly found in northern and central regions of the state than in southern and western regions. Adult I. scapularis were active from autumn through spring and complementary to adult A. americanum and D. variabilis. Standardized survey methods help reduce sampling biases and better characterize risk from the species surveyed. However, differences in the attractiveness of collection methods for different tick species makes cross-species comparisons a continuing challenge.
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Arzua, Márcia, Valeria C. Onofrio, and Darci M. Barros-Battesti. "Catalogue of the tick collection (Acari, Ixodida) of the Museu de História Natural Capão da Imbuia, Curitiba, Paraná, Brazil." Revista Brasileira de Zoologia 22, no. 3 (2005): 623–32. http://dx.doi.org/10.1590/s0101-81752005000300015.
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The tick collection of the Museu de Historia Natural Capão da Imbuia was first sorted in the end of the 80's, and a list of specimens was published in 1992. During the last ten years, the collection has grown substantially and became the depository collection for type-specimens. The collection is the most regional representative depository of ticks from the State of Paraná, and it is one of the four largest Brazilian collections in number of specimens. All material was revised, and the data were computerized and catalogued in cards. To date, the collection includes 504 vials, with 2,073 specimens, belonging to 25 species and six genera of the families Argasidae and Ixodidae. The ticks were collected in regional and state parks and in green areas from 60 municipalities distributed within eight Brazilian states. This catalogue corrects some of the records published in 1992 for the state of Paraná and records new host species for Amblyomma aureolatum (Pallas, 1772), A. cajennense (Fabricius, 1787), A. longirostre (Koch, 1844), A. tigrinum Koch, 1844, Ixodes aragaoi Fonseca, 1935, I. auritulus Neumann, 1904, I. fuscipes Koch, 1844 and I. paranaensis Barros-Battesti, Arzua, Pichorim & Keirans, 2003. Amblyomma brasiliense Aragão, 1908, A. coelebs Neumann, 1899, A. nodosum Neumann, 1899 and I. fuscipes are recorded, for the first time, from the state of Paraná; A. longirostre from Rio Grande do Sul; I. fuscipes from Santa Catarina; I. schulzei Aragão & Fonseca, 1951 from Rondônia; and A. rotundatum Koch, 1844 from Bahia. In addition Haemaphysalis juxtakochi Cooley, 1946 and I. fuscipes are recorded for the first time, infesting birds.
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DUCORNEZ, S., M. GARINE-WICHATITSKY, N. BARRÉ, G. UILENBERG, and J. L. CAMICAS. "Tick Reference Collection of the Late Dr. P.C. Morel." Annals of the New York Academy of Sciences 969, no. 1 (2002): 318–22. http://dx.doi.org/10.1111/j.1749-6632.2002.tb04399.x.
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Menin, Michel, Carolain Xavier, Mauricio Francisco Grigolo, et al. "Factors associated with the efficiency of acaricides on different populations of Rhipicephalus microplus." Brazilian Journal of Veterinary Research and Animal Science 56, no. 3 (2019): e157595. http://dx.doi.org/10.11606/issn.1678-4456.bjvras.2019.157595.
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Tick infestation causes major problems in cattle. Tick parasitism accounts for significant economic losses in many beef and dairy herds in the vast majority of the states in the Brazilian territory including the State of Santa Catarina in the southern region of the country. Tick resistance to several active principles occurs due to a number of factors including the indiscriminate, injudicious and inadequate use of tick insecticides. Considering the great importance of fighting off tick infestations in cattle, we evaluated the efficiency of 8 different topical active principles against the ixodid tick R. microplus and identified the main factors that contribute to the development of ticks that are resistant to acaricides in the farms and bovine herds studied. For such purpose, R. microplus telegionae were collected in 39 farms locates in different municipalities of the West of Santa Catarina, south Brazil. At the time of sample collection, information about the management, the history of the acar used in the herd, the number of annual applications of these pesticides, the frequency of acaricide rotation, and the frequency of technical monitoring for strategic tick control were retrieved. We collected this data in order determine contributing factors to the development resistant R. microplus populations. For the sensitivity profile of these ticks to a number of different acaricides tested, 10 engorged females for each principle and a control were used. The results of our study show that most associations between pyrethroids and organophosphates had an efficiency between 96.6% and 100% in the control of R. microplus except for the combination of Alfacipermetrine 15%, Ethion 16%, and Chlorpyrifos 8.5% that had 93.4% of efficiency. Among the chemicals not associated with any other type of compound, Amitraz 12.5% was effective in 98.3% of the cases. In contrast, Cypermethrin 15% had an efficiency in only 25.8% of the farms/herds analyzed. Based on the results of the present study, we may infer that the methods of control and management used by producers may be related to the low indexes of resistance to topical acaricides in the different populations of ticks in the study area.
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Estrada-Peña, Agustín, Aitor Cevidanes, Hein Sprong, and Javier Millán. "Pitfalls in Tick and Tick-Borne Pathogens Research, Some Recommendations and a Call for Data Sharing." Pathogens 10, no. 6 (2021): 712. http://dx.doi.org/10.3390/pathogens10060712.
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An understanding of the relationships of ticks and tick-borne pathogens can only be achieved by integrating data from multiple studies. The publication of raw material is a necessary step for wide-area meta-analyses and study design, data collection and reporting require harmonization. This is an opinion paper, not a consensus position, and is open to debate. This work reflects our view about how data should be communicated in mainstream journals. We indicate rules that should be observed in recording weather data, to avoid serendipitous correlations between the density of ticks and climate variables and recommend the inclusion of raw data in reports. We stress the need for standardized methods to collect ticks that cannot be obtained by standard flagging. The reporting of infection rates of pathogens in ticks should avoid conclusions based on pure molecular findings in feeding ticks. Studies demonstrating the vectorial capacity of ticks should not be supported only by molecular surveys of feeding ticks. Vacuous conclusions about vectorial or reservoir status based solely on the finding of genomic material of a pathogen should be discouraged. We stress that phylogenetic studies based on random selection of sequences from GenBank are unsuitable. We firmly support the development of a dedicated server of curated sequences of ticks and pathogens as a standard for future studies.
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Gonzalez, Irys Hany Lima, Marcelo Bahia Labruna, Carolina Romeiro Fernandes Chagas, et al. "Ticks infesting captive and free-roaming wild animal species at the São Paulo Zoo, São Paulo, Brazil." Revista Brasileira de Parasitologia Veterinária 26, no. 4 (2017): 496–99. http://dx.doi.org/10.1590/s1984-29612017036.
Full textAbstract:
Abstract Ticks are ectoparasites of worldwide distribution that affect vertebrates and can transmit pathogens to animals and humans. The Zoological Park Foundation of São Paulo (FPZSP) is located in a Conservation Unit in one of the most important remaining fragments of the Atlantic Rainforest biome in the suburbs of São Paulo, Brazil. The FPZSP houses more than 3,000 wild animals on exhibit, in breeding programs and in environmental education programs, and also attracts migratory birds and free-roaming wildlife. This study focused on identifying the diversity of tick species that infest captive and free-roaming animals at the FPZSP. The collection of ticks kept at the FPZSP contains 523 specimens that were collected from different host species between 1990 and 2017. Ten tick species were found. In addition, Amblyomma aureolatum (Pallas) was found on stray cats living in the Atlantic forest fragment in the FPZSP. This study reveals a low occurrence of parasitism in captive animals and a high diversity of tick species collected from hosts in this Atlantic forest fragment, contributing information about host-parasite relationships and potential vectors of zoonotic diseases, since the vectors of Brazilian spotted fever, A. aureolatum and Amblyomma sculptum Berlese, were found in some hosts.
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RÜEGG, S. R., P. TORGERSON, P. DEPLAZES, and A. MATHIS. "Age-dependent dynamics of Theileria equi and Babesia caballi infections in southwest Mongolia based on IFAT and/or PCR prevalence data from domestic horses and ticks." Parasitology 134, no. 7 (2007): 939–47. http://dx.doi.org/10.1017/s0031182007002405.
Full textAbstract:
SUMMARYEpidemiological factors of tick-borne equine piroplasmoses, caused by Theileria equi and Babesia caballi, were investigated using logistic regression (GLM) and general additive models (GAM) based on the prevalences determined in 510 domestic horses and in ticks in S.W. Mongolia by indirect immunofluorescence antibody test (IFAT) and/or multiplex PCR. Prevalences of T. equi and B. caballi in horses were 66·5% (95% CI: 62·1–70·7) and 19·1% (15·6–22·9), respectively by PCR and 78·8% (74·9–82·3) and 65·7% (61·3–69·9) by IFAT. Of 166 ticks analysed from PCR- and IFAT-negative horses 1 was PCR positive for B. caballi and none for T. equi. GAM demonstrated non-linear increasing proportions of T. equi-PCR and -IFAT positive horses with age suggesting persistent infection. In contrast, the B. caballi-PCR prevalence decreased with age despite a concurrent increase in the proportion of IFAT-positive animals suggesting parasite elimination. The tick (Dermacentor nuttalli) burden of the horses increased with age and decreased with advancing season. Geldings were more likely to be infected with, and seroconvert to, T. equi. Neither herd affiliation, date of sample collection nor abundance of tick infestation had a significant influence on parasite prevalence.
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Lee, Xia, Darby S. Murphy, Diep Hoang Johnson, and Susan M. Paskewitz. "Passive Animal Surveillance to Identify Ticks in Wisconsin, 2011–2017." Insects 10, no. 9 (2019): 289. http://dx.doi.org/10.3390/insects10090289.
Full textAbstract:
The introduction of new tick species poses a risk to human and animal health. Systematic active surveillance programs are expensive and uncommon. We evaluated a passive animal surveillance program as a monitoring tool to document the geographic distribution and host associations of ticks in Wisconsin. Passive surveillance partners included veterinary medical clinics, domestic animal shelters, and wildlife rehabilitation centers from 35 of the 72 Wisconsin counties. A total of 10,136 tick specimens were collected from 2325 animals from July 2011 to November 2017 and included Dermacentor variabilis Say (29.7% of all ticks), Ixodes texanus Banks (25.5%), Ixodes scapularis Say (19.5%), Haemaphysalis leporispalustris Packard (13.8%), Ixodes cookei Packard (4.4%), and Dermacentor albipictus Packard (1.7%). Less common species (<1% of collection) included Ixodes dentatus Marx, Ixodes sculptus Neumann, Ixodes marxi Banks, Amblyomma americanum Linnaeus, and Rhipicephalus sanguineus Latreille. Of the 2325 animals that were examined, most were domestic dogs (53%), eastern cottontail rabbits (16%), domestic cats (15%), and North American raccoons (11%). An additional 21 mammal and 11 bird species were examined at least once during the six years of the study. New county records are summarized for each species. Public health, academic, and veterinary and animal care partners formed a community of practice enabling effective statewide tick surveillance.
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Casa, Mariana da Silva, Julio de M. Vettori, Ketriane M. De Souza, et al. "High prevalence of Anaplasma marginale in the Crioula Lageana cattle." Journal of Infection in Developing Countries 14, no. 06 (2020): 623–30. http://dx.doi.org/10.3855/jidc.11691.
Full textAbstract:
Introduction: Bovine anaplasmosis is caused by the bacterium Anaplasma marginale; its transmission occurs through vectors such as ticks. Crioula Lageana is a native cattle breed from the South of Brazil used for beef production, with excellent meat quality. There are no studies of the epidemiology of this disease in Crioula Lageana even though tick damage is known to be frequent.
 Methodology: Blood samples were collected from 311 Crioula Lageana cattle and subjected to DNA extraction and polymerase chain reaction (PCR) using specific primers for the Major Surface Protein 5 (msp5) gene for the detection of the bovine anaplasmosis agent. The animals were classified according to the gender, the category and the presence or absence of ticks at the time of collection. The animal owners completed an epidemiological questionnaire to determine factors that might be associated with anaplasma infection.
 Results: The prevalence of A. marginale was 79.9%. The following factors were found to be protective against infection: I) the breeding objectives (whether animals were destined for beef production and trade or solely for beef production), II) tick control rate; and III) pregnant and lactating cows and calves as the categories least affected by the hemoparasite. The main risk factor for hemoparasite acquisition was the use of organophosphates and avermectins as acaricides.
 Conclusions: Crioula Lageana cattle are in a situation of enzootic stability, with a high prevalence of A. marginale infection. The factors associated with the infection were: I) breeding objectives, II) tick control rate, III) the acaricides used, and IV) the most tick-parasitized categories of cattle.
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AUSTEN, J. M., U. M. RYAN, J. A. FRIEND, W. G. F. DITCHAM, and S. A. REID. "Vector of Trypanosoma copemani identified as Ixodes sp." Parasitology 138, no. 7 (2011): 866–72. http://dx.doi.org/10.1017/s0031182011000497.
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SUMMARYA total of 41 ticks were collected from 15 quokkas on Bald Island and 2 ticks from a Gilbert's potoroo from Two Peoples Bay. Three species of Ixodid ticks Ixodes australiensis, Ixodes hirsti and Ixodes myrmecobii were identified on the quokkas known to have a high prevalence of Trypanosoma copemani. Tick faeces from ticks isolated from 8 individual quokkas and a Gilbert's potoroo were examined with one identified as positive for trypanosomes. Faecal examination revealed trypanosomes similar to in vitro life-cycle stages of T. copemani. In total 12 ticks were dissected and trypanosomes found in sections of their midgut and haemolymph, 49 and 117 days after collection. Tick faeces, salivary glands and midguts from I. australiensis were screened using an 18S rRNA PCR with amplification seen only from the midguts. Sequencing showed 100% homology to T. copemani (genotype A) and 99·9% homology to the wombat (AII) isolate of T. copemani. Trypanosomes were only detected in I. australiensis as neither I. hirsti nor I. myrmecobii survived the initial 30-day storage conditions. We therefore identify a vector for T. copemani as I. australiensis and, given the detection of trypanosomes in the faeces, suggest that transmission is via the faecal-oral route.
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Gurfield, Nikos, Saran Grewal, Lynnie S. Cua, Pedro J. Torres, and Scott T. Kelley. "Endosymbiont interference and microbial diversity of the Pacific coast tick,Dermacentor occidentalis, in San Diego County, California." PeerJ 5 (April 13, 2017): e3202. http://dx.doi.org/10.7717/peerj.3202.
Full textAbstract:
The Pacific coast tick,Dermacentor occidentalisMarx, is found throughout California and can harbor agents that cause human diseases such as anaplasmosis, ehrlichiosis, tularemia, Rocky Mountain spotted fever and rickettsiosis 364D. Previous studies have demonstrated that nonpathogenic endosymbiotic bacteria can interfere withRickettsiaco-infections in other tick species. We hypothesized that withinD. occidentalisticks, interference may exist between different nonpathogenic endosymbiotic or nonendosymbiotic bacteria and Spotted Fever group Rickettsia (SFGR). Using PCR amplification and sequencing of therompA gene and intergenic region we identified a cohort of SFGR-infected and non-infectedD. occidentalisticks collected from San Diego County. We then amplified a partial segment of the 16S rRNA gene and used next-generation sequencing to elucidate the microbiomes and levels of co-infection in the ticks. The SFGRR. philipiistr. 364D andR. rhipicephaliwere detected in 2.3% and 8.2% of the ticks, respectively, viarompA sequencing. Interestingly, next generation sequencing revealed an inverse relationship between the number ofFrancisella-like endosymbiont (FLE) 16S rRNA sequences andRickettsia16S rRNA sequences within individual ticks that is consistent with partial interference between FLE and SFGR infecting ticks. After excluding theRickettsiaand FLE endosymbionts from the analysis, there was a small but significant difference in microbial community diversity and a pattern of geographic isolation by distance between collection locales. In addition, male ticks had a greater diversity of bacteria than female ticks and ticks that weren’t infected with SFGR had similar microbiomes to canine skin microbiomes. Although experimental studies are required for confirmation, our findings are consistent with the hypothesis that FLEs and, to a lesser extent, other bacteria, interfere with the ability ofD. occidentalisto be infected with certain SFGR. The results also raise interesting possibilities about the effects of putative vertebrate hosts on the tick microbiome.