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Shin, Sung-Shik, Dae-Jung Cha, Kyoung-Oh Cho, Ho-Sung Cho, Jeong-Ok Choi, and Shin-Hyeong Cho. "Arthrostoma miyazakiense (Nematoda: Ancylostomatidae) infection in raccoon dogs of Korea and experimental transmission to dogs." Korean Journal of Parasitology 45, no. 2 (2007): 121. http://dx.doi.org/10.3347/kjp.2007.45.2.121.
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Yevstafieva, V. А., S. O. Kravchenko, B. V. Gutyj, V. V. Melnychuk, P. N. Kovalenko, and L. B. Volovyk. "Morphobiological analysis of Trichuris vulpis (Nematoda, Trichuridae), obtained from domestic dogs." Regulatory Mechanisms in Biosystems 10, no. 2 (2019): 165–71. http://dx.doi.org/10.15421/021924.
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The parasitic nematode Trichuris vulpis Frölich, 1789 is the pathogen of trichuriasis in domestic and wild carnivores, and humans. This helminth species is distributed world-wide in populations of domestic dog (Canis lupus familiaris). The prevalence of T. vulpis in dogs depends to a large degree on the morphofunctional and biological adaptations of the parasite which support its high survivability in various environmental conditions. The present study considers the species-specific peculiarities of morphology, and metric parameters of the mature and embryonic stages of Trichuris nematodes parasitizing in C. lupus familiaris. We studied the periods of stages of development and infectious egg formation, and their survivability under optimal conditions for T. vulpis in laboratory culture. The differential characteristics of both female and male adult T. vulpis nematodes include the metric characteristics of cuticular protrusions at the surface of the anterior body part. The male T. vulpis nematodes can be distinguished from males of other species by the specifics of spicule sheath ornamentation, the shape and size of spicule, and the width of spicule sheath at different sections. In identification of the female nematodes of this species, it is necessary to consider the presence and size of papillary processes in the vulval area and metric parameters of vulva location. Nine metric characters of sexual dimorphism are described for T. vulpis nematodes. In laboratory conditions, five embryonic stages were observed for T. vulpis: protoplast, blastomere cleavage, and formation of bean-like embryo, larva and mobile larva. These stages are characterized by specific morphological features. The egg develops to the infectious stage at 27 °С in 18 days of culture, and their survivability is up to 76.6%. The egg development is associated with changes in their metric characters, such as decreasing egg length and width of egg shell, and increasing egg width and egg plug width.
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FUKASE, TOHRU. "Strongyloides stercoralis(Nematoda; Strongyloididae) Obtained from Purebred Dogs in Japan." Journal of the Japan Veterinary Medical Association 39, no. 9 (1986): 563–67. http://dx.doi.org/10.12935/jvma1951.39.563.
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Rappeti, Josaine Cristina da Silva, Carolina Siqueira Mascarenhas, Soliane Carra Perera, et al. "Dioctophyme renale (Nematoda: Enoplida) in domestic dogs and cats in the extreme south of Brazil." Revista Brasileira de Parasitologia Veterinária 26, no. 1 (2016): 119–21. http://dx.doi.org/10.1590/s1984-29612016072.
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Abstract Dioctophyme renale is a zoonotic nematode that parasites the kidneys of wild and domestic carnivores, and it has been reported frequently in Brazil. The aim here was to register the number of cases of dogs and cats diagnosed with dioctophymosis by necropsy (1981 to 2014) and ultrasound examination (2010 to 2015) in Pelotas-RS. In this context, a survey was conducted on dioctophymosis cases diagnosed at the Veterinary Pathology Laboratory (LPV) and Veterinary Clinical Hospital (HCV) of the Federal University of Pelotas (UFPel), and at a specialist veterinary imaging diagnostics clinic. In total, 95 cases were registered. The high series of the disease in dogs can be related to the presence of a large number of stray and semi-domestic dogs in the city, and also due to the ingestion of intermediate hosts of D. renale parasitized with the infective larvae. Thus, it can be concluded that Pelotas is a city with favorable conditions for the occurrence of dioctophymosis with high rate of disease in recent years.
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Mascarenhas, Carolina Silveira, Julia Veiga Pereira, and Gertrud Müller. "Occurrence of Dioctophyme renale larvae (Goeze, 1782) (Nematoda: Enoplida) in a new host from southern Brazil." Revista Brasileira de Parasitologia Veterinária 27, no. 4 (2018): 609–13. http://dx.doi.org/10.1590/s1984-296120180060.
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Abstract Dioctophymatosis is caused by the giant kidney worm Dioctophyme renale which occurs in dogs, cats, and wild mammals. In Brazil, the disease has been diagnosed in dogs from several states around the country. In the present study, the occurrence of D. renale larvae in snakes from southern of Brazil is reported. Three specimens of Philodryas patagoniensis (Serpentes: Dipsadidae) (common names in Brazil: “parelheira”, “papa-pinto”) roadkill in the county of Capão do Leão, State of Rio Grande do Sul, southern Brazil, were necropsied. Two third-stage larvae of D. renale were found in the coelomic cavity of P. patagoniensis. This study reveals a new host for D. renale larvae in the southern region of the State of Rio Grande do Sul, Brazil. This particular geographic area of the country has stood out as several cases of D. renale infection have been reported in a number of vertebrates from this region including domestic dogs and cats and wild animals such as carnivores, fish, and freshwater turtles.
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Yevstafieva, V., K. Horb, V. Melnychuk, T. Bakhur, and D. Feshchenko. "Ectoparasites Ctenocephalides (Siphonaptera, Pulicidae) in the Composition of Mixed Infestations in Domestic Dogs from Poltava, Ukraine." Folia Veterinaria 64, no. 3 (2020): 47–53. http://dx.doi.org/10.2478/fv-2020-0026.
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AbstractOne of the most common ectoparasites on domestic carnivores are fleas from the genus Ctenocephalides. This group of blood sucking insects are one of the most important in medical and veterinary terms, as they can serve as carriers of dangerous infectious and may cause other invasive diseases. Research studies have established a variety of fleas and other contagions parasitizing domestic dogs in Poltava, Ukraine. Certain peculiarities of these ectoparasitic studies, as a part of mixed infestations of dogs, have recently been determined. The results of the studies have shown that the species composition of the fleas was represented by two main species. The dominant species was Ct. felis, and their prevalence was 36.05 %. Another species (Ct. canis) was diagnosed less often and had a prevalence of 27.94 %. It was found that in 31.18 % of the dogs, the blood-sucking insects were mostly parasitizing in the form of an associations with: nematoda (Toxocara canis, Trichuris vulpis, Uncinaria stenocephala), Cestoda (Dipylidium caninum), protozoa (Cystoisospora canis), and another ectoparasite (Trichodectes canis). Overall, 33 types of mixed infestations were detected. Moreover, the number of different parasitic species in each dog ranged from one to seven. Fleas of the genus Ctenocephalides (in the composition of two species of parasites) were registered the most often (14.60 %). The infestation of dogs with other forms of mixed infestations was 0.69—8.01 %. The most frequent co-members for Ct. felis were Cestoda [D. caninum (13.47 %)], for Ct. canis—Cestoda [D. caninum (11.23 %)] and Nematoda [T. vulpis (8.29 %)].
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Shi, Y. E., J. J. Han, W. Y. Yang, and D. X. Wei. "Thelazia callipaeda (Nematoda: Spirurida): transmission by flies from dogs to children in Hubei, China." Transactions of the Royal Society of Tropical Medicine and Hygiene 82, no. 4 (1988): 627. http://dx.doi.org/10.1016/0035-9203(88)90535-4.
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Saichenko, I. "Spread and seasonal dynamics of dogs helminthiasis in BilaTserkva district." Naukovij vìsnik veterinarnoï medicini, no. 1(165) (May 25, 2021): 119–28. http://dx.doi.org/10.33245/2310-4902-2021-165-1-119-128.
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Over the past decades, the number of dogs and cats has increased significantly on the territory of Ukraine. At each step, animals are in danger of non-contagious and contagious etiology. Parasitic diseases are almost half of the entire contagious pathologies of small animals. Number of invasive diseases depends on the following factors: season, age, sex, breeding features and also implementation and control of preventive measures against helminthiasis. Therefore, our research is to study thefeatures of distribution, seasonality, species composition and extensiveness of invasion of dog gelminthias on the territory of Bila Tserkva district, Kyiv region. The helminthocoproovoscopy research was carried out with a combined method standardized by G.O. Kotelnikov and V.M . Khrenov. The result of the study of faeces tests showed the problems of Bila Tserkva district with nematodoses and cestodoses of dogs. Regarding the species composition of the helminths we found, the helminths of the Nematoda class had a significant advantage: T. vulpis, T. canis, T. leonina, A. caninum, C. plica, U. stenocephala; among Cestoda class helminths, only D. caninum was diagnosed. Diagnosed pathogens of helminthiasis in dogs were mono- and myxinvasions. The research of seasonal dynamics of dog helminthosis revealed a high prevalence throughout the year. In summer, the helminthic prevalence of dogs reached the maximum index. In autumn, the intensity decrease. In winter, we received the minimum EI. In spring, the number of ill animals was increased. The species composition recorded by us in the spring was presented: T. vulpis and T. canis, both mono- and myxinvasion. In summer, T. vulpis, T. canis, C. plica, A. caninum, U. stenocephala. In winter, T. vulpis and T. canis dominate again. A feature of the autumn season for helminthiasis in dogs was the predominance of T. vulpis over other species of nematodes and cestodes in dogs. Regarding the age, sex and breed characteristics of the dog, the following results were obtained. The most comfortable were animals aged from birth to 7 years. Sex of animals (female, male), as shown by the results of our study, without affecting the infestation of helminthic infestations of dogs. As follows from the analysis of the results of helminthological studies, more susceptible are animals of the German Shepherd, Dachshund, Russian Spaniel breeds. Key words: epizootology, seasonality, dogs, helminthiasis, trichurosis, toxocariasis, intestinal strongylates, coproovoscopic studies, extensiveness of invasion.
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Omeragić, Jasmin, Davor Alagić, Sabina Šerić-Haračić, et al. "Zoonotic Endoparasites in Dogs from the Bosnian-Podrinje Canton, Bosnia and Herzegovina." Macedonian Veterinary Review 44, no. 1 (2021): 63–70. http://dx.doi.org/10.2478/macvetrev-2021-0011.
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Abstract More than 30 dog parasite species have been identified in Bosnia and Herzegovina so far, and half of these are zoonotic. The aim of the study was to investigate the occurrence of parasitic infections in dogs from Bosnian-podrinje canton with a focus on zoonotic parasites. The study included 212 dogs (107 owned and 105 stray). One or more of the twenty parasite species were found in 82.55% of tested samples. Dicrocoelium dendriticum (Class Trematoda) was found in 0.94% of dogs. Dipylidium caninum and Mesocestoides lineatus (Class Cestoda) were found in 7.55% and 0.94% of dogs, respectively. Taenia spp. and Echinococcus spp. (Family Taeniidae) were found in 0.47% and 0.94% of samples, respectively. In the family of Nematoda, the following parasite species were identified with corresponding percent among tested dogs: Toxocara canis (25.94%), Toxascaris leonine (8.96%), Strongyloides stercoralis (0.47%), Ancylostoma caninum (3.77%), Uncinaria stenocephala (52.36%), Trichuris vulpis (22.17%), Eucoleus aerophilus (1.42%), Dirofilaria immitis (1.89%) and Dirofilaria repens (1.42%). In the kingdom of Protozoa, the following parasite species were identified with corresponding percent among tested dogs: Cystoisospora canis (8.49%), C. ohioensis (2.36%), Cryptosporidium spp. (4.72%), Sarcocystis spp. (0.47%), Babesia spp. (5.19%), and Giardia duodenalis (15.57%). Leishmania infantum was not identified in tested samples. The results showed a high level of parasitic infestation in the dog population in the Bosnian-Podrinje canton, with a high occurrence of zoonotic parasites. Significant differences were found between owned and stray dogs for all classes of detected parasites with exception of the class Trematoda, disregarding specific parasite species.
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Trindade, Maira Aparecida Christello, Márcia Raquel Pegoraro de Macedo, César Jaeger Drehmer, and Gertrud Muller. "First record of Lagochilascaris minor (Nematoda: Ascarididae) in Leopardus geoffroyi (Carnivora: Felidae) in Brazil." Revista Brasileira de Parasitologia Veterinária 28, no. 4 (2019): 812–15. http://dx.doi.org/10.1590/s1984-29612019087.
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Abstract Lagochilascariasis is a parasitic disease caused by nematodes of the genus Lagochilascaris. These parasites occur in the neotropical region and their definitive hosts are wild animals, domestic dogs and felids and, accidentally, humans. Here, infection by Lagochilascaris minor is recorded for the first time in a wild felid, in Brazil.
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Landolfi, Jennifer A., Baktiar O. Karim, Sarah L. Poynton, and Joseph L. Mankowski. "HEPATIC CALODIUM HEPATICUM (NEMATODA) INFECTION IN A ZOO COLONY OF BLACK-TAILED PRAIRIE DOGS (CYNOMYS LUDOVICIANUS)." Journal of Zoo and Wildlife Medicine 34, no. 4 (2003): 371–74. http://dx.doi.org/10.1638/02-095.
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Takács, András, László Szabó, Lajos Juhász, et al. "Data on the parasitological status of golden jackal (Canis aureus L., 1758) in Hungary." Acta Veterinaria Hungarica 62, no. 1 (2014): 33–41. http://dx.doi.org/10.1556/avet.2013.058.
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In Hungary, twenty Canis aureus individuals were submitted to parasitological examinations in 2010–2012. Two Coccidia: Cystoisospora canis (15%) and Toxoplasma-type oocysts (5%), one Trematoda: Alaria alata (10%), six Cestoda: Mesocestoides lineatus (20%), Echinococcus granulosus (10%), Dipylidium caninums (5%), Taenia hydatigena (15%), Taenia pisiformis (20%), Taenia crassiceps (40%), and nine Nematoda: Angiostrongylus vasorum (10%), Crenosoma vulpis (30%), Capillaria aerophila (5%), Toxocara canis (20%), Toxascaris leonina (15%), Trichuris vulpis (10%), Ancylostoma caninum (45%), Uncinaria stenocephala (40%), Capillaria plica (45%) have been identified. Angiostronglyus vasorum has been reported from carnivores in Europe, Africa, South America and North America. The helminth A. vasorum or French heartworm is a metastrongylid nematode, widely distributed in Western Europe, that infects the pulmonary arterial tree of dogs, various species of foxes, wolves, Eurasian badgers, coyotes and stoats. To our knowledge, this is the first report of natural A. vasorum infection in golden jackal.
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Barrera-Pérez, Mario, Pablo Manrique-Saide, Enrique Reyes-Novelo, Javier Escobedo-Ortegón, Manuel Sánchez-Moreno, and Cuauhtémoc Sánchez. "Lagochilascaris minor Leiper, 1909 (Nematoda: Ascarididae) in Mexico: three clinical cases from the Peninsula of Yucatan." Revista do Instituto de Medicina Tropical de São Paulo 54, no. 6 (2012): 315–17. http://dx.doi.org/10.1590/s0036-46652012000600005.
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Human lagochilascariasis (HL) is a parasite produced by Lagochilascaris minor Leiper 1909 that also can be found in cats and dogs. HL is considered an emerging zoonosis in the Americas, spreading from Mexico to Argentina, and the Caribbean Islands. The present paper describes three HL cases from the Peninsula of Yucatan, Mexico, recorded in the last decade. It describes the characteristics of the lesions and discusses the route of transmission in humans and particularly in the observed patients.
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Hoa, Le Thi Khanh, Hoang Van Hien, Phan Thi Hong Phuc, Nguyen Thi Kim Lan, and Pham Ngoc Doanh. "Morphological and molecular characterization of Spirocerca lupi (Nematoda: Spirocercidae) from domestic dogs in Vietnam with reference to Spirocerca vulpis." Parasitology International 84 (October 2021): 102381. http://dx.doi.org/10.1016/j.parint.2021.102381.
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Pană, D., A. Rădulescu, I. L. Mitrea, and M. Ionita. "First report on clinical feline heartworm (Dirofilaria immitis) infection in Romania." Helminthologia 57, no. 1 (2020): 49–56. http://dx.doi.org/10.2478/helm-2020-0009.
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SummaryDirofilaria immitis (Nematoda: Filarioidea) is the causative agent of heartworm disease (HWD), a severe and potentially fatal condition in dogs. Although cats are considered more resistant to infection than dogs, they are also susceptible to heartworm infection. Moreover, the clinical importance of feline dirofilariosis has increased in recent years, especially in heartworm endemic areas. In contrast to dog, definitive antemortem diagnosis of heartworm infection in cat is difficult to achieve and a combination of testing methods must be used for clinical confirmation. Here we describe a clinical case of heartworm infection in a 12-year-old male mixed breed cat, originated from Southern Romania, which was referred to a veterinary clinic with a history of vomiting and clinical signs of respiratory distress. The thoracic radiograph showed a diffuse bronchointerstitial pattern of the pulmonary parenchyma. The serological test for D. immitis circulating antibody was positive and heartworms were visualized by echocardiography in the main pulmonary artery. In conclusion, the present study clearly shows that cats are at risk for D. immitis infection in heartworm-endemic areas in Romania. Additionally, the findings highlight the urgent need for increased awareness among veterinary practitioners of the existence of feline heartworm diseases and for adequate prophylactic measures to be applied. To our knowledge, this is the first report on clinical evolution and radiographic and echocardiographic features of a naturally heartworm-infected cat in Romania.
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Ntampaka, Pie, François Niragire, Philip Njeru Nyaga, and Gervais Habarugira. "Canine Gastrointestinal Nematodiases and Associated Risk Factors in Kigali City, Rwanda." Journal of Parasitology Research 2021 (July 23, 2021): 1–8. http://dx.doi.org/10.1155/2021/9956256.
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Canine nematodes pose a public health risk to humans and livestock; however, the prevalence of canine nematodiases in Rwanda is unknown. This study aimed at determining the prevalence of canine nematodiases and identifying the risk factors for such infections in Kigali, the capital city of Rwanda. A cross-sectional study involved 93 dogs selected across Kigali city. Faecal samples were collected from apparently healthy dogs, and nematode eggs were identified and quantified using the McMaster technique. Risk factors for canine nematodiases were analysed by a multivariable binary logistic regression model. The overall prevalence of gastrointestinal (GI) nematodiases in dogs was 33.3% (95% CI: 23.8–42.9). The most prevalent species was Ancylostoma spp with 32.3% (95% CI: 22.8–41.8). Nearly 38.7% and 3.2% of the dogs infected with Ancylostoma spp and Toxocara canis had high egg counts per gram (EPG) of faeces (≥550), respectively. Approximately 96.8% of dogs infected with nematodes had monoinfection. Logistic regression analysis showed that dog’s age (1 to 2.5 years old), location (Gasabo and Kicukiro districts), and feeding practices were significantly associated with prevalence of canine nematodiases. In particular, the adjusted odds ratio (AOR) was more than 5 times higher for dogs fed on uncooked animal products and leftovers from households and restaurants compared to those who ate food prepared for them. The AOR was also about 16 times higher for dogs that scavenged and ate leftovers from households compared to those who ate food prepared for them. The findings of this study indicate that the prevalence of GI nematodes in domestic dogs in Kigali city, Rwanda, was 33.3% (95% CI: 23.8–42.9). The identified nematodes, namely, Ancylostoma spp. and Toxocara canis, are zoonotic, and dogs and humans are at risk of contracting these nematodes. The factors associated with canine GI nematodes in Kigali city include feeding practices and the dog’s age and location (district). Dog owners need to rethink procedures for deworming and feeding their dogs. Again, the public should be made aware of the role of dogs in transmitting zoonotic nematodes to humans.
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Gugosyan, Y. A., O. O. Boyko, and V. V. Brygadyrenko. "Morphological variation of four species of Strongyloides (Nematoda, Rhabditida) parasitising various mammal species." Biosystems Diversity 27, no. 1 (2019): 85–98. http://dx.doi.org/10.15421/011913.
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Study of the morphologic peculiarities of free-living stages of nematodes of the Strongyloides genus is important in differential diagnostics of pathogens. We studied the parasite of goats (Capra aegagrus hircus Linnaeus, 1758) – Strongyloides papillosus (Wedl, 1856); the parasite of horses (Equus ferus caballus Linnaeus, 1758) – S. westeri Ihle, 1917; the parasite of swine (Sus scrofa Linnaeus, 1758 ) – S. ransomi Schwartz & Alicata, 1930; the parasite of dogs (Canis lupus familiaris Linnaeus, 1758) – S. stercoralis (Bavay, 1876). Rhabditiform larvae (L1, L2), filarial larvae (L3), mature males (M) and free-living females (F) were analyzed for each of the four species by five morphological parameters: body length (Lb), total maximum body width (Sb), length of the esophagus (Lo), length of the intestine (Le), length of the tail end (Lc); for females, we additionally examined length from the head end to the vulva (Lv) and the number of formed eggs in the uterus cavity (E), and for males – length of spicules (Ls). First stage larvae of S. papillosus and S. stercoralis significantly differed in all parameters, and first stage larvae of S. westeri and S. stercoralis significantly differed in four out of five parameters. By indices of ratios of total maximum body width (Sb) to body length (Lb), length of the esophagus (Lo) to length of the intestine (Le), length of the tail end (Lc) to body length (Lb), length of the intestine (Le) to body length (Lb), a reliable difference was recorded between L1 of S. papillosus and S. ransomi, L3 of S. papillosus and S. westeri, S. westeri and S. ransomi, between males of S. papillosus and S. westeri, S. westeri and S. stercoralis, between females of S. papillosus and S. westeri, S. papillosus and S. stercoralis. All four examined species were observed to have reliable differences of ratio of length of esophagus to length of intestine in third stage larvae.
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Akramova, F. J., M. Sh Toremuratov, U. A. Shakarbaev, L. A. Rakhmonova, D. A. Azimov, and L. U. Erkinova. "Ecological analysis of helminth fauna of wild artiodactyles (Mammalia: artiodactyla) in Karakalpakstan." Russian Journal of Parasitology 14, no. 4 (2020): 11–23. http://dx.doi.org/10.31016/1998-8435-2020-14-4-11-23.
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The purpose of the research is studying current fauna of helminths in wild artiodactyls and analysis of their ecological relationships with populations of representatives of the Artiodactyla in biogeocenoses of Karakalpakstan.Materials and methods. Wild populations of artiodactyls were studied in 2016–2020 in the ecosystems of the Kyzyl Kum, Ustyurt and the lower reaches of the Amu Darya, including the drained bottom of the Aral Sea. Some killed animals (the saiga, Persian gazelle, and Bokharan deer) seized from poachers, as well as those killed by predators and feral dogs in the sanctuaries and reserves of Karakalpakstan were used to collect helminthological material. Wild boars were examined after shooting during the hunting season. A total of 11 saigas, 13 Persian gazelles, 7 Bokharan deer and 16 wild boars, and 213 fecal samples from these animals were examined. The studies were carried out using generally accepted methods of dissection (Skryabin, 1928; Ivashkin et al., 1971) and ovoscopy of animal feces. For a comparative analysis of helminth fauna of the study animals, we used previously collected (1959–1978) parasites from the wild boar, saiga, Persian gazelle and Bokharan deer in Karakalpakstan.Results and discussion. We have found that the fauna of the Artiodactyla is represented by the following 5 species in the biogeocenosis of Karakalpakstan: Sus scrofa nigripes Blan., Cervis elaphus bactrianus Lydek., Gazella subgutturosa Gueld., Saiga tatarica Linn., and Ovis orientalis arcal Gmel., in which we identified 26 helminth species classified as Cestoda, Trematoda and Nematoda. Cestodes are represented by 6 species, trematodes by 2 species, and nematodes by 18 species. The helminth species composition of the study animals is 14 species in pigs, 11 species in Bokharan deer, 13 species in saigas and 14 species in Persian gazelles. Representatives of the genera Taenia, Echinococcus, Fasciola, Schistosoma, Gongylonema and Setaria are common to these animal species. By nature of the biological cycle, the helminths of the study artiodactyls recorded by us can be divided into two groups: monoxenous and heteroxenous. Monoxenous parasites include representatives of the Trichocephalidae (3 species), Trichostrongylidae (2 species), Dictyocaulidae (2 species), Syphaciidae (1 species), and Ascarididae (1 species), whose life cycles proceed without changing hosts. Eighteen species of representatives of cestodes (6 species), trematodes (2 species) and nematodes (10 species) are developed with the involvement of intermediate hosts.
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Medina-Pinto, Rodrigo Adán, Roger Iván Rodríguez-Vivas, and Manuel Emilio Bolio-González. "Zoonotic intestinal nematodes in dogs from public parks in Yucatán, México." Biomédica 38, no. 1 (2018): 105. http://dx.doi.org/10.7705/biomedica.v38i0.3595.
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Introducción. Los perros representan un potencial riesgo para la salud pública debido a que transmiten infecciones parasitarias al hombre.Objetivo. Estimar la frecuencia y determinar los factores asociados a la presencia de huevos de nematodos intestinales en heces de perros recolectadas en parques públicos de Mérida, Yucatán, México.Materiales y métodos. Se analizaron 100 muestras de heces de perros recolectadas en 20 parques públicos de dos zonas de la ciudad. Las muestras se procesaron mediante las técnicas de flotación centrifugada y de McMaster para confirmar la presencia de huevos de nematodos intestinales y cuantificarlos por gramo de heces. Se determinaron los factores asociados a la presencia de los huevos mediante un análisis univariado de χ2.Resultados. Se encontró una frecuencia de 11 %. Se identificaron huevos de tres especies de parásitos y Ancylostoma caninum fue el más frecuente (10 %), seguido por Toxocara canis (1 %) y Trichuris vulpis (1 %). La mayoría de las muestras positivas presentaba infección con un nematodo intestinal únicamente (10 %) y solo el 1 % resultó positivo para infección mixta por A. caninum y T. vulpis. La presencia de perros sin dueño en los parques públicos fue el factor asociado (p=0,046) con un mayor número de heces positivas para huevos de nematodos intestinales.Conclusiones. En los parques de la ciudad se encontraron heces de perros con huevos de nematodos intestinales con potencial zoonótico; la probabilidad de que las muestras fueran positivas fue mayor en los parques con presencia de perros sin dueño.
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Davies, Kerrie A., Weimin Ye, Gary S. Taylor, Sonja Scheffer, and Robin M. Giblin-Davis. "Galling problems – the Fergusobia nematode/Fergusonina fly mutualism on myrtaceous hosts." Nematology 18, no. 6 (2016): 629–49. http://dx.doi.org/10.1163/15685411-00003002.
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Fergusobia (Sphaerularioidea, Tylenchida) is the only known nematode to have a dicyclic life cycle with a generation in a plant (a myrtaceous host) followed by one in an insect (a Fergusonina fly: Diptera, Fergusoninidae). The nematode and fly have a mutualistic association, with the nematode inducing a plant gall on which the fly feeds and develops, and the fly providing transport for the nematode. The life cycle, specificity, diversity and distribution of the nematode are described, and the nematode phylogeny is discussed. Fergusobia is monophyletic but its origins are unclear. This paper raises questions about Fergusobia, including: what model best accounts for evolution of the known diversity of the nematode/fly mutualism?; how are the nematode/fly life cycles coordinated?; how do the nematodes avoid resistance mechanisms of both flies and plants?; what cecidogenic processes does the nematode use?; and what is the form of parthenogenesis occurring in Fergusobia and how does it relate to the inheritance of variability? Given the models of genomes and transcriptomes now available for other plant-parasitic nematodes and the availability of technologies to examine Fergusobia, it should be possible to answer some of these questions and begin to understand how Fergusobia nematodes might have evolved.
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Půža, Vladimír, and Zdeněk Mráček. "Does scavenging extend the host range of entomopathogenic nematodes (Nematoda: Steinernematidae)?" Journal of Invertebrate Pathology 104, no. 1 (2010): 1–3. http://dx.doi.org/10.1016/j.jip.2010.01.002.
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Baker, Emily A., and Alison Woollard. "How Weird is The Worm? Evolution of the Developmental Gene Toolkit in Caenorhabditis elegans." Journal of Developmental Biology 7, no. 4 (2019): 19. http://dx.doi.org/10.3390/jdb7040019.
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Comparative developmental biology and comparative genomics are the cornerstones of evolutionary developmental biology. Decades of fruitful research using nematodes have produced detailed accounts of the developmental and genomic variation in the nematode phylum. Evolutionary developmental biologists are now utilising these data as a tool with which to interrogate the evolutionary basis for the similarities and differences observed in Nematoda. Nematodes have often seemed atypical compared to the rest of the animal kingdom—from their totally lineage-dependent mode of embryogenesis to their abandonment of key toolkit genes usually deployed by bilaterians for proper development—worms are notorious rule breakers of the bilaterian handbook. However, exploring the nature of these deviations is providing answers to some of the biggest questions about the evolution of animal development. For example, why is the evolvability of each embryonic stage not the same? Why can evolution sometimes tolerate the loss of genes involved in key developmental events? Lastly, why does natural selection act to radically diverge toolkit genes in number and sequence in certain taxa? In answering these questions, insight is not only being provided about the evolution of nematodes, but of all metazoans.
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DEMKOWSKA-KUTRZEPA, MARTA, KLAUDIUSZ SZCZEPANIAK, PAULINA DUDKO, et al. "Determining the occurrence of the Uncinaria stenocephala and Ancylostoma caninum nematode invasion in dogs in Poland, with special emphasis on the Lublin region." Medycyna Weterynaryjna 74, no. 8 (2018): 526–31. http://dx.doi.org/10.21521/mw.6104.
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Apart from roundworms, Ancylostomatidae nematodes are presently the most frequently observed nematodes in dogs in Poland, with two species described so far: Uncinaria stenocephala and Ancylostoma caninum. The study aimed to determine the hookworm species found in dogs in Poland, with special emphasis on the Lublin region. The study material consisted of fecal samples collected from 500 dogs from the area of the Lublin voivodeship. With the use of microscope methods, parasite eggs were found in 56.4% of the samples, dominated by the Ancyclostomidae nematode (26.8%). The isolated hookworm eggs were subject to morphometric measurements, giving a mean length of 77.60 μm and width of 44.25 μm (±SD ±6.01 and ±4.54 respectively) within the range 67-91 × 36-56 μm. The hookworm larvae that hatched from the samples were subject to molecular analysis (72 samples) and all were identified as U. stenocephala. In the area of the Lublin voivodeship U. stenocephala is the dominant hookworm species in dogs.
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Gherman, Călin Mircea, Angela Monica Ionică, Georgiana Deak, Gabriel Bogdan Chișamera, and Andrei Daniel Mihalca. "Co-infection with Angiostrongylus chabaudi and Dirofilaria immitis in a wildcat, Felis silvestris from Romania – a case report." Acta Veterinaria Brno 88, no. 3 (2019): 303–6. http://dx.doi.org/10.2754/avb201988030303.
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Dirofilaria immitis is a worldwide spread nematode affecting the pulmonary artery and the heart of dogs (rarely reported in cats), especially in areas where the dogs show a high prevalence of infection. Angiostrongylus chabaudi is, in turn, a cardiopulmonary nematode of felids identified in several southern European countries and Germany. Co-infections of Dirofilaria immitis and Angiostrongylus spp. are known only in canids. We report a case of D. immitis and A. chabaudi co-infection in a road-killed wildcat originating from Southeastern Romania. Overall, 17 nematodes were collected from the pulmonary arteries of the wildcat and were morphologically identified as A. chabaudi (2 males and 15 females). Another nematode was collected from the right ventricle and identified as adult male D. immitis. Genomic DNA was extracted from one nematode of each of the two species and a fragment of the cox1 gene was amplified and sequenced. The sequences obtained from the nematodes showed 100% similarity to a sequence of A. chabaudi isolated from Romania (Accession number KU521521) and to various D. immitis sequences from Europe, Asia and Australia (e.g. KT716014, EU159111, AJ537512). This is the first report of A. chabaudi and D. immitis co-infection in a felid, revealing the possibility of similar situations in domestic cats. This requires a more in-depth clinical and laboratory examination of animals with respiratory and cardiac symptoms.
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Burke, Mark, Elizabeth H. Scholl, David McK Bird, et al. "The plant parasite Pratylenchus coffeae carries a minimal nematode genome." Nematology 17, no. 6 (2015): 621–37. http://dx.doi.org/10.1163/15685411-00002901.
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Here we report the genome sequence of the lesion nematode, Pratylenchus coffeae, a significant pest of banana and other staple crops in tropical and sub-tropical regions worldwide. Initial analysis of the 19.67 Mb genome reveals 6712 protein encoding genes, the smallest number found in a metazoan, although sufficient to make a nematode. Significantly, no developmental or physiological pathways are obviously missing when compared to the model free-living nematode Caenorhabditis elegans, which possesses approximately 21 000 genes. The highly streamlined P. coffeae genome may reveal a remarkable functional plasticity in nematode genomes and may also indicate evolutionary routes to increased specialisation in other nematode genera. In addition, the P. coffeae genome may begin to reveal the core set of genes necessary to make a multicellular animal. Nematodes exhibit striking diversity in the niches they occupy, and the sequence of P. coffeae is a tool to begin to unravel the mechanisms that enable the extraordinary success of this phylum as both free-living and parasitic forms. Unlike the sedentary endoparasitic root-knot nematodes (Meloidogyne spp.), P. coffeae is a root-lesion nematode that does not establish a feeding site within the root. Because the P. coffeae nematode genome encodes fewer than half the number of genes found in the genomes of root-knot nematodes, comparative analysis to determine genes P. coffeae does not carry may help to define development of more sophisticated forms of nematode-plant interactions. The P. coffeae genome sequence may help to define timelines related to evolution of parasitism amongst nematodes. The genome of P. coffeae is a significant new tool to understand not only nematode evolution but animal biology in general.
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Aikawa, Takuya, Natsumi Kanzaki, and Noritoshi Maehara. "ITS-RFLP pattern of Bursaphelenchus xylophilus (Nematoda: Aphelenchoididae) does not reflect nematode virulence." Journal of Forest Research 18, no. 4 (2013): 384–88. http://dx.doi.org/10.1007/s10310-012-0354-1.
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Rodger, S., A. G. Bengough, B. S. Griffiths, V. Stubbs, and I. M. Young. "Does the Presence of Detached Root Border Cells of Zea mays Alter the Activity of the Pathogenic Nematode Meloidogyne incognita?" Phytopathology® 93, no. 9 (2003): 1111–14. http://dx.doi.org/10.1094/phyto.2003.93.9.1111.
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The root-knot nematode Meloidogyne incognita is a major pathogen of a range of important crops. Currently, control is typically achieved by the use of nematicides. However, recent work suggests that manipulating the ability of roots to slough off border cells, which then act as a decoy to the nematode, can significantly decrease damage to the roots. We investigated the attractiveness of border cells to M. incognita and the response of the nematode to border cells in close proximity. We found very limited attraction, in that nematodes did not preferentially alter direction to move toward the border cells, but a large and significant increase in nematode speed was observed once they were in the immediate vicinity of border cells. We discuss the results in the context of physical and biological mechanisms in relation to the control of pathogenic nematodes.
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Rolbiecki, Leszek, Joanna N. Izdebska, Marta Franke, Lech Iliszko, and Sławomira Fryderyk. "The Vector-Borne Zoonotic Nematode Thelazia callipaeda in the Eastern Part of Europe, with a Clinical Case Report in a Dog in Poland." Pathogens 10, no. 1 (2021): 55. http://dx.doi.org/10.3390/pathogens10010055.
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Thelazia callipaeda is a zoonotic nematode transmitted by drosophilid flies. It causes ocular thelaziosis, a disease of carnivores, such as dogs, cats, and foxes, and also humans. The parasite has thus far been observed in various areas of Eurasia, including 20 countries within Europe. The present study documents its presence in the south-east region of Poland, near the Ukraine border. An adult nematode was removed from the conjunctival sac of a dog showing ocular inflammation and purulent discharge. The dog’s precise origin is unknown. Based on its localization and morphometrical features, the nematode was identified as a Thelazia callipaeda adult male. The present study is the first report of T. callipaeda in a dog in Poland.
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Rolbiecki, Leszek, Joanna N. Izdebska, Marta Franke, Lech Iliszko, and Sławomira Fryderyk. "The Vector-Borne Zoonotic Nematode Thelazia callipaeda in the Eastern Part of Europe, with a Clinical Case Report in a Dog in Poland." Pathogens 10, no. 1 (2021): 55. http://dx.doi.org/10.3390/pathogens10010055.
Full textAbstract:
Thelazia callipaeda is a zoonotic nematode transmitted by drosophilid flies. It causes ocular thelaziosis, a disease of carnivores, such as dogs, cats, and foxes, and also humans. The parasite has thus far been observed in various areas of Eurasia, including 20 countries within Europe. The present study documents its presence in the south-east region of Poland, near the Ukraine border. An adult nematode was removed from the conjunctival sac of a dog showing ocular inflammation and purulent discharge. The dog’s precise origin is unknown. Based on its localization and morphometrical features, the nematode was identified as a Thelazia callipaeda adult male. The present study is the first report of T. callipaeda in a dog in Poland.
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Ilic, Tamara, Milan Rogosic, Bojan Gajic, and Jelena Aleksic. "Urinary capillariosis in dogs." Veterinarski glasnik, no. 00 (2020): 3. http://dx.doi.org/10.2298/vetgl191009003i.
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Background. Urinary capillariosis in dogs is caused by Capillaria plica (syn. Pearsonema plica), a ubiquitous parasitic nematode resembling a string which belongs to the family Capillariidae. It parasitizes the feline, canine and musteline urinary bladder, and has been found in ureters and renal pelvises as well. C. plica has an indirect life cycle, with earthworms (Lumbricina) as intermediate hosts and domestic and wild animals (dog, cat, fox and wolf) as primary hosts. Infection of primary hosts occurs via ingestion of earthworms that contain infective first stadium (L1) larvae. An alternative path of infection for primary hosts is assumed to be ingestion of soil contaminated by infectious larvae derived from decomposed earthworms. Infection is mostly asymptomatic, but the clinical picture presents with pollakiuria, dysuria, haematuria, polydipsia, incontinence and/or fever. Scope and Approach. The aim of this review is to highlight the importance of urinary capillariosis in dogs. Since the health care of wild and domestic carnivores is extremely important, this review provides information about the morphology, biology and epizootiology of the C. plica nematode. Due to the importance of this disease for clinicians and increased disease prevalence during the last decade in many countries, this review presents the latest information on the pathogenesis, clinical signs, diagnosis, treatment and prevention of this infection. Key Findings and Conclusions. Capillariosis is usually accidentally diagnosed due to the nonspecific clinical signs and there is no treatment of choice. Practitioners should consider latent urinary capillariosis infection as a possible cause while examining for urinary tract diseases.
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O’Connell, Adam, Ian Scott, Naomi Cogger, Boyd Jones, and Kate Hill. "Parasitic Nematode and Protozoa Status of Working Sheepdogs on the North Island of New Zealand." Animals 9, no. 3 (2019): 94. http://dx.doi.org/10.3390/ani9030094.
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Working farm dogs in New Zealand may have a high parasitic challenge because of access to raw meat and close contact with other dogs. This cross-sectional study aimed to estimate the percentage of dogs with gastrointestinal nematode and protozoan parasite lifecycle stages present in their feces and to identify factors associated with the presence of parasites. A single researcher collected information about the dogs and their management via a questionnaire, body condition scored (BCS) the dogs, and collected fecal samples to determine the parasite burden. Fecal samples were collected from 171 dogs and 40% (95% CI 33.0% to 47.7%) contained parasite ova or (oo)cysts. There was no association between BCS and the presence of nematodes and parasites (p = 0.74) in the feces. The percentage of dogs with parasites present in their feces was not associated with BCS or the frequency with which anthelmintic drugs were reportedly administered (p = 0.61). The high percentage of dogs with parasites are of concern for the health of the dogs and their owners, given the zoonotic potential of some parasites. Further, research should also focus on understanding why reporting giving anthelmintic drugs at least every three months did not eliminate the infection.
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Valishin, E. J., Yu A. Vatnikov, Yu Yu Voronina, A. A. Gazin, and D. A. Molchanova. "DISTRIBUTION OF NEMATOD CEM. ANCYLOSTOMATIDAE DOMESTIC DOGS." Theoretical & applied problems of agro-industry 34, no. 1 (2018): 32–35. http://dx.doi.org/10.32935/2221-7312-2018-34-1-32-35.
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Bird, A. F. "The influence of the actionmycete,Pasteuria penetrans, on the host–parasite relationship of the plant-parasitic nematode,Meloidogyne javanica." Parasitology 93, no. 3 (1986): 571–80. http://dx.doi.org/10.1017/s0031182000081270.
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SUMMARYThe actinomycete,Pasteuria penetrans, is a specific endoparasite of various plant-parasitic nematodes. When parasitizing the root-knot nematode (Meloidogyne javanical) the nematode's capacity to reproduce is destroyed and feeding on and stimulation of the plant host are unaffected even though the bulbous body of the female nematode becomes filled with spores. Parasitism by the actinomycete does not alter the rate of growth in the early stages of nematode development although the non-parasitized female grows more rapidly than the parasitized one for a short time immediately after the final moult.Pasteuriadid not invade or inactivate the anterior oesophageal region of the femaleMeloidogyneor influence the morphology of the giant cells induced by these nematodes in their hosts' roots. The influence of this parasite on the developmental physiology of its nematode host is discussed.
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Studham, Matthew, Gustavo C. MacIntosh, Felicitas Avendaño, David Soh, and Gregory L. Tylka. "The Soybean Resistance Gene Rag1 Does Not Protect Against Soybean Cyst and Root-knot Nematodes." Plant Health Progress 10, no. 1 (2009): 44. http://dx.doi.org/10.1094/php-2009-0401-01-br.
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The only well-characterized gene controlling soybean aphid (SBA) resistance is Mi-1.2, a tomato gene that also confers resistance to root-knot nematodes (RKN). Based on similarities between Mi-1.2 and Rag1, which produces a strong antibiosis-type resistance, the authors hypothesized that Rag1 could also provide resistance to nematodes. They evaluated two soybean lines, one carrying the Rag1 gene, and one with no resistance gene, for susceptibility or resistance to soybean cyst nematode (SCN) and RKN. Accepted for publication 4 March 2009. Published 1 April 2009.
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Dzimira, S., and P. Przadka. "Cytological diagnostics of subcutaneous dirofilariasis imitating proliferative lesions in dogs." Veterinární Medicína 65, No. 12 (2020): 537–42. http://dx.doi.org/10.17221/88/2020-vetmed.
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Subcutaneous dirofilariasis is a disease in animals caused by invasions of nematodes, most often of the following species: Dirofilaria repens, D. tenuis, and D. striata transmitted by mosquitoes. Until recently, D. repens was endemic to the Mediterranean countries in Europe, but, in recent years, it has also been increasingly reported in Central and Eastern Europe. Cytological preparations collected by a fine-needle aspiration biopsy from nodular lesions located in the subcutis and skin of dogs were used to diagnose suspected proliferative lesions of a cancerous or inflammatory nature. The microscopic examination of the delivered cytological preparations revealed erythrocytes (very numerous), neutrophils and eosinophils (quite numerous), macrophages (single), and whole and/or damaged fragments of microfilariae of Dirofilaria sp. in various numbers. It should be noted that the described infection of Dirofilaria repens in Poland and other countries of this latitude will be an increasingly common pathology in dogs. Due to the mosquitoes transmitting the microfilariae, it is a zoonosis that is an increasingly frequent and a more serious threat to humans. In the differential diagnosis of various types of skin and subcutis lesions of unknown aetiology, dirofilariasis should be considered.
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Saichenko, I., and A. Antipov. "An epizootic situation is in relation to the nematodosiss of gastroenteric channel of dogs." Naukovij vìsnik veterinarnoï medicini, no. 1(154) (May 21, 2020): 54–62. http://dx.doi.org/10.33245/2310-4902-2020-154-1-54-62.
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Gastrointestinal nematodes are prevalent among dogs in Ukraine and most other countries. Economic losses in dog breeding for invasive diseases are diffi cult to calculate in material terms, but they are clearly manifested in terms of animal health. Therefore, the purpose of the research was to fi nd out the epizootic situation regarding the nematodes of the gastrointestinal tract in dogs of diff erent age, sex and breed groups in the Belotserkovsky district of Kyiv region. The studies were conducted on the territory of single-sector private sector farms of 15 settlements of Belotserkovsky district and on the territories of shelters for homeless animals of Belaya Tserkov. Koprovoskopichesky researches were carried out by the combined method standardized by Kotelnikov - Hrenov. According to the results of coprovoscopy of samples from dogs of the Belotserkovsky area, a signifi cant spread of nematodes of the gastrointestinal canal was established (EI was 50.18%). Eggs of such nematodes as Trichuris vulpis, Toxocara canis, Ancylostoma caninum, Toxascaris leonina, Strongyloides stercoralis were isolated. Diseases were recorded in the form of mono-invasions, among which the largest proportion of the aff ected were trihuriza (27.11%), toxocariasis (6.59), ankylostomosis (1.83%), and myxinvasions, which again led the trichuris. Animals from birth to 7 years were most aff ected. In terms of gender, females were more vulnerable. The highest incidence of invasion was among outbred dogs (51.56%). Most dogs in this group are aff ected by trichuris (54.55%) and myxinvasia (29.29%), which also included T. vulpis. Breeds German Shepherd, Dachshund, Russian Spaniel had the highest percentage of nematode infestations among all studied breeds. The leader among pathogens was T. vulpis, which covered more than half (52.63%) of rocks, myxinvasions were 28.94%, which included T. vulpis. The breeds of the Belgian shepherd, shih-tzu, Russian-European chamomile, alabai were resistant. Key words: dog, invasion, trichrosis, toxocariasis, ankylostomosis, toxascarose, distribution, koproovoskopichni research, extensiveness of invasion, intensity of invasion.
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Čabanová, Viktória, Martina Miterpáková, Martin Oravec, et al. "Nematode Thelazia callipaeda is spreading across Europe. The first survey of red foxes from Slovakia." Acta Parasitologica 63, no. 1 (2018): 160–66. http://dx.doi.org/10.1515/ap-2018-0018.
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Abstract Canine thalaziosis caused by the spirurid nematode Thelazia callipaeda has started to spread across Western and Central Europe during the last decade. In Slovakia, the first autochthonous cases of this infection were recorded in 2016 in four dogs from the south-eastern part of the country. In August 2017 other autochthonous case, again from the same locality, was reported. Seeing that red foxes are considered the main reservoir hosts for T. callipaeda, their examination could provide an integrated view of the real parasite distribution. Within the present study, 523 red foxes were examined by necropsy, and T. callipaeda nematodes were recovered from the conjunctival sacs of 7 animals, which represents an overall positivity of 1.3%. Six infected foxes originated in eastern Slovakia, which is consistent with the area where positive dogs were recently found. Also, single positive red fox was found in north-western Slovakia. Regarding morphology and morphometry, the specimens recovered from the foxes in this study were evaluated as larger in size when compared to nematodes isolated from Slovak dogs as well as dogs and foxes from other studies. BLAST analyses of the cox1 gene showed that all specimens isolated from Slovak red foxes were identified as haplotype 1 which circulated also in other European countries. Considering that majority of the infected animals, dogs and foxes, came from Košice region, we can presume that this area might become endemic in a short period of time.
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Saichenko, I. V., A. A. Antipov, T. I. Bakhur, L. V. Bezditko, and S. S. Shmayun. "Co-infection of Trichuris vulpis and Toxocara canis in different aged dogs: Influence on the haematological indices." Biosystems Diversity 29, no. 2 (2021): 129–34. http://dx.doi.org/10.15421/012117.
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Trichuris vulpis and Toxocara canis are worldwide parasitic nematodes affecting dogs and mammals of the Canine family. Due to the special structure of the shells, the eggs of these geohelminths can maintain their viability in soil, sand, water and the environment for a long time. The study involved young (6–12 months old) and adult (1.5–8.0 years old) dogs affected by co-infection of T. vulpis + T. canis; the control group consisted of dewormed healthy animals of the same age. Parasitological examination of dogs' faeces was performed using a "Counting Chamber for Ovoscopic Researches"; morphological parameters, indicators of nutrient metabolism, mineral metabolism and activity of enzymatic systems were determined in blood and serum. According to the results of parasitological research on the dogs, it was found that young animals are more prone to toxocarosis, and adults – trichurosis. The co-infection of nematodes T. vulpis + T. canis in dogs develops several changes in haematological parameters: a significant decrease in erythrocytes, haemoglobin, MCV, MCH, and haematocrit, leukocytosis with basophils and eosinophilia in young infected animals; and eosinophilia and basophilia (15.9 times) in adults, compared with healthy dogs of the same age. Among the changes in serum biochemical parameters, young infected dogs showed a decrease in the concentration of total protein and albumin content, an increase in the content of "acute phase" proteins (α-1, α-2 and β-globulins), an increase in cholesterol and total bilirubin; in adult infected dogs, a decrease in albumin content, an increase in the content of α-1, α-2, and β-globulins, an increase in the concentration of cholesterol and total bilirubin, a decrease in the concentration of urea in comparison with healthy animals were determined. Also, among the indicators of mineral metabolism, a decrease in the concentration of calcium and magnesium in the serum was found in young infected dogs. Among the changes in the enzyme metabolism in the serum of infected dogs, there was an increase in the activity of all studied enzymes in animals of both research groups: ALT, AST, α-amylase, GGT and ALP. Thus, co-infection with nematodes T. vulpis + T. canis has a complex pathogenic effect on the body of dogs of all ages, which manifested itself in multiple changes in haematological parameters. In the future, the authors’ team plan to develop comprehensive measures to combat nematode infections in different living conditions of dogs, taking into account the results of the current research.
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Wolfe, A., and I. P. Wright. "Parasitic nematode eggs in fur samples from dogs." Veterinary Record 154, no. 13 (2004): 408. http://dx.doi.org/10.1136/vr.154.13.408.
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Kłudkowska, Matylda, Łukasz Pielok, Krystyna Frąckowiak, Aleksander Masny, Elżbieta Gołąb, and Małgorzata Paul. "Dirofilaria repens infection as a cause of intensive peripheral microfilariemia in a Polish patient: process description and cases review." Acta Parasitologica 63, no. 3 (2018): 657–63. http://dx.doi.org/10.1515/ap-2018-0077.
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Abstract Dirofilariasis is a parasitic disease of dogs and other carnivores transmitted mainly by the mosquitoes of the genera Culex, Aedes, Anopheles. Full life cycle of the Dirofilaria nematodes in humans is extremely rarely observed, usually lacking species determination at the molecular level. We report fully documented unusual clinical manifestation of subcutaneous dirofilariasis with intensive microfilariemia in peripheral blood revealed by the Knott’s concentration technique. The identification of the Dirofilaria repens nematode was based on typical morphological findings for adult gravid female nematode found in the histopathological preparations. The morphology of microfilariae obtained from patient’s peripheral blood was also typical for D. repens. The final identification was confirmed by the molecular analysis of microfilariae collected from the blood.
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Gouge, D. H., and N. G. M. Hague. "The susceptibility of different species of sciarid flies to entomopathogenic nematodes." Journal of Helminthology 69, no. 4 (1995): 313–18. http://dx.doi.org/10.1017/s0022149x00014887.
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AbstractSteinernema feltiae is the most effective nematode for controlling sciarid species but S. carpocapsae does exert some control. S. feltiae is less effective at 30°C than at 22°C. S. anomali, S. riobravis and two Heterorhabditis spp. gave better control at the higher temperature. All six sciarid species tested were susceptible to S. feltiae but there was some variation in the level of infection. UK isolates of S. feltiae were more effective against UK sciarids than the nematode isolates from other European countries which were tested. Adult sciarids are infected by S. feltiae and can disperse nematodes to nematode-free compost.
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Sawahata, Takuo, Hitoshi Nakamura, Hiroaki Okada, Atsuko Sasaki, and Satoko Kanematsu. "Nonlethal ectoparasitism of the mycophagous nematode Filenchus discrepans (Nematoda: Tylenchidae)." Nematology 14, no. 2 (2012): 159–64. http://dx.doi.org/10.1163/138855411x584025.
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Filenchus discrepans ingested hyphal contents of Botrytis cinerea without killing the hyphal cells that they fed on. Individuals of this nematode penetrated B. cinerea hyphae with their stylets, after which intense pulsation of the median bulb and dorsal gland duct followed (indicating salivation). In addition, light pumping of the median bulb (indicating food ingestion) was also observed. Fungal cells continued to show cytoplasmic streaming while the nematode ingested hyphal contents. Moreover, actively growing tips of the hyphae usually continued their growth during and after cytoplasm ingestion by the nematode. In less active, older hyphae the penetrated tip cells stopped growing during nematode feeding. However, the majority of the tip cells resumed growth after feeding by the nematode. The hyphal tips often exhibited an abnormal shape during nematode feeding and gradually regained normal shape and growth afterwards. The growth rate of hyphal tip cells decreased to less than 10% compared with the growth of intact hyphal tip cells during attack by F. discrepans, which often fed on a hyphal cell for up to 3 h. Filenchus discrepans propagated well in B. cinerea cultures and their population growth rate ranged between six- and 11-fold 1 month after incubation. This is the first report of nonlethal ectoparasitism by a mycophagous nematode, showing that the nematode does not kill fungal cells during and after feeding.
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Jayasinghe, R. D., S. R. Gunawardane, M. A. M. Sitheeque, and S. Wickramasinghe. "A Case Report on Oral Subcutaneous Dirofilariasis." Case Reports in Infectious Diseases 2015 (2015): 1–4. http://dx.doi.org/10.1155/2015/648278.
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Dirofilariasis is an uncommon zoonotic parasitic infection affecting human. The natural hosts for this nematode are animals such as dogs, cats, foxes, jackals, and raccoons. This disease is endemic in South Eastern United States, Australia, Europe, and Central and Southern Asia.Dirofilaria immitisandD. repensare the common mosquito borne filarial nematodes that cause infection. Several species of mosquitos includingMansonia uniformis,M. annulifera, andAedes aegyptiare the potential vectors for this disease in Sri Lanka. Two rare cases of dirofilariasis presenting as facial and intraoral lumps are presented.
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Waetzig, Georg, Miroslaw Sobczak, and Florian Grundler. "Localization of hydrogen peroxide during the defence response of Arabidopsis thaliana against the plant-parasitic nematode Heterodera glycines." Nematology 1, no. 7 (1999): 681–86. http://dx.doi.org/10.1163/156854199508702.
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AbstractHydrogen peroxide (H2O2) production during the infection of Arabidopsis thaliana by the soybean cyst nematode Heterodera glycines was detected histochemically by the reaction of H2O2 with cerium chloride producing four different patterns of electron-dense precipitates of cerium perhydroxides. As A. thaliana is not a regular host of H. glycines, the defence response is considerable, but does not completely inhibit the development of the nematode. H2O2 was produced not only by cells mechanically damaged during invasion and feeding site induction by the nematode, but also by cells surrounding developing syncytia and cells which were neither in contact with the nematode nor with the syncytium. Die Lokalisation von Peroxid wahrend der Abwehrreaktion von Arabidopsis thaliana gegen den pflanzenparasitaren Nematoden Heterodera glycines - Die Bildung von Wasserstoffperoxid (H2O2) im Rahmen der Infektion von Arabidopsis thaliana durch den Sojabohnen-Zystennematoden Heterodera glycines wurde histochemisch durch die Reaktion von H2O2 mit Cerchlorid nachgewiesen, wobei vier verschiedene Muster elektronendichter Prazipitate von Cerperhydroxiden gebildet wurden. Da A. thaliana kein regularer Wirt von H. glycines ist, kommt es zu einer betrachtlichen Abwehrreaktion, die jedoch die Entwicklung des Nematoden nicht vollstandig verhindert. H2O2 wurde nicht nur von Zellen produziert, die im Laufe des Eindringens und der Induktion des Nahrzellensystems durch den Nematoden mechanisch beschadigt worden waren, sondern auch von Zellen, die sich entwickelnde Syncytien umgaben und von Zellen, die weder mit dem Nematoden noch mit dem Syncytium in Kontakt standen.
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Angelou, A., K. Tsakou, K. Mpranditsas, G. Sioutas, D. Anderson Moores, and E. Papadopoulos. "Giant kidney worm: novel report of Dioctophyma renale in the kidney of a dog in Greece." Helminthologia 57, no. 1 (2020): 43–48. http://dx.doi.org/10.2478/helm-2020-0008.
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SummaryDioctophyma renale is the largest nematode that infects domestic mammals and is the aetiologic agent of a serious renal disease, dioctophymatosis. It has an indirect life cycle with carnivores serving as final hosts and earthworms as intermediate hosts. The parasite can infect humans with signifi cant zoonotic potential. The pathogenesis of dioctophymatosis is mainly associated with the extent of renal atrophy caused by the parasites, the risk of bilateral renal infestation and the location of the parasite (extrarenal cases). Clinical diagnosis is challenging, and the only treatment option is nephrectomy or nephrotomy to remove the adult nematode. A 6-year-old female crossbreed dog presented with tachypnea, tachycardia and severe hematuria, but died shortly after presentation. Postmortem examination found the right kidney was enlarged and two adult nematodes were found in the renal pelvis. The left kidney was normal. The nematodes were collected and submitted for identifi cation. The two specimens were identifi ed as D. renale using specific identifi cation keys. Herein we present the first case of renal parasitosis by the nematode D. renale in a dog from Greece. This case highlights the need for investigation of the actual prevalence of the parasite and the use of measures for the control of its expansion aiming the protection of dogs and public health.
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Mehrabani, D., S. M. Sadjjadi, A. Oryan, and S. M. R. Tabatabase. "Nematode parasites of stray dogs in shiraz, southern iran." Parasitology International 47 (August 1998): 162. http://dx.doi.org/10.1016/s1383-5769(98)80390-5.
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Čerevková, A., and L. Cagáň. "Effect of transgenic insect-resistant maize to the community structure of soil nematodes in two field trials." Helminthologia 52, no. 1 (2015): 41–49. http://dx.doi.org/10.1515/helmin-2015-0001.
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Summary The aim of this study was to determine the effects of Bt maize hybrid cultivation on soil nematode communities in two field trials, as well as to analyse other factors (fertilisation and moisture) responsible for the community structure of soil nematodes. Nematode communities were studied in maize plots at the locality of Borovce in western Slovakia. During 2012 and 2013, hybrids DK440 and DKC3871 (conventional) or DKC4442YG and DKC3872YG (Bt maize, event MON810) were sown in 10 repetitions each. Nematodes were extracted from soil samples collected at the maize flowering (July 11, 2012 and July 30, 2013). Altogether, 39 nematode species belonged to 35 genera were identified in two maize variants. The dominant taxa in both variants were Acrobeloides nanus, Ce-phalobus persegnis, Aphelenchoides composticola, Aphelenchus avenae, Eudorylaimus carteri and Filenchus vulgaris. Calculation of the maturity index, plant parasitic index, enrichment index and structure index did not confirm any clear influence of year or hybrid type on soil nematode communities. The proportional representation of cp-1, cp-2 and cp-3-5 groups of nematode fauna indicated conditions of low stability and high stress. Faunal profiles representing the structure and enrichment conditions of the soil food web showed an environment with a high C:N ratio and high levels of fungal feeders. Based on the calculation of the metabolic footprint of nematodes in the soil food web, a difference between the isoline maize variant and Bt maize variant in 2012 was found, but this difference was not readily apparent in 2013. The occurrence of nematodes, their abundance, proportion of feeding types and selected ecological indices did not depend on the type of maize hybrid (Bt or non-Bt). Thus, the cultivation of genetically modified maize did not directly influence nematode populations. The application of fertiliser at certain periods does not influence the nematode community. The observed significant higher abundance of nematodes was correlated with soil moisture.
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Wang, Congli, Steven Lower, and Valerie M. Williamson. "Application of Pluronic gel to the study of root-knot nematode behaviour." Nematology 11, no. 3 (2009): 453–64. http://dx.doi.org/10.1163/156854109x447024.
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Abstract Pluronic F-127 is a stable, non-toxic, copolymer that forms a gel at room temperature and a liquid at 15°C when the concentration is 20-30%. Root-knot nematode (Meloidogyne spp.) second-stage juveniles can move freely through the gel and display attraction toward roots of tomato, Medicago truncatula, common bean and Arabidopsis. The excellent clarity of the gel allows examination of behavioural changes in the nematode as it reaches and infects its host. Attraction assays showed that Meloidogyne javanica and M. incognita move to roots much more rapidly than does M. hapla. Nematodes form aggregates when in contact with root tips suggesting that the presence of a signal from the nematode or from the root is involved in the attraction. Nematodes suspended in Pluronic gel without roots aggregate into balls after 1 to 2 days. A coverslip placed on the gel accelerates and serves as a focus for the aggregation, suggesting that lower oxygen, or perhaps a volatile attractant, is involved in this behaviour. These observations demonstrate that Pluronic gel is a useful medium for dissecting attraction of root-knot nematodes to their hosts and for studying additional aspects of their behaviour.
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Yacob, H. T., T. Ayele, R. Fikru, and A. K. Basu. "Gastrointestinal nematodes in dogs from Debre Zeit, Ethiopia." Veterinary Parasitology 148, no. 2 (2007): 144–48. http://dx.doi.org/10.1016/j.vetpar.2007.06.007.
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Satjawongvanit, Hathaithip, Atchara Phumee, Sonthaya Tiawsirisup, et al. "Molecular Analysis of Canine Filaria and Its Wolbachia Endosymbionts in Domestic Dogs Collected from Two Animal University Hospitals in Bangkok Metropolitan Region, Thailand." Pathogens 8, no. 3 (2019): 114. http://dx.doi.org/10.3390/pathogens8030114.
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Canine filariasis is caused by several nematode species, such as Dirofilaria immitis, Dirofilaria repens, Brugia pahangi, Brugia malayi, and Acanthocheilonema reconditum. Zoonotic filariasis is one of the world’s neglected tropical diseases. Since 2000, the World Health Organization (WHO) has promoted a global filarial eradication program to eliminate filariasis by 2020. Apart from vector control strategies, the infection control of reservoir hosts is necessary for more effective filariasis control. In addition, many studies have reported that Wolbachia is necessary for the development, reproduction, and survival of the filarial nematode. Consequently, the use of antibiotics to kill Wolbachia in nematodes has now become an alternative strategy to control filariasis. Previously, a case of subconjunctival dirofilariasis caused by Dirofilaria spp. has been reported in a woman who resides in the center of Bangkok, Thailand. Therefore, our study aimed to principally demonstrate the presence of filarial nematodes and Wolbachia bacteria in blood collected from domestic dogs from the Bangkok Metropolitan Region, Thailand. A total of 57 blood samples from dogs with suspected dirofilariasis who had visited veterinary clinics in Bangkok were collected. The investigations for the presence of microfilaria were carried out by using both microscopic and molecular examinations. PCR was used as the molecular detection method for the filarial nematodes based on the COI and ITS1 regions. The demonstration of Wolbachia was performed using PCR to amplify the FtsZ gene. All positive samples by PCR were then cloned and sequenced. The results showed that the filarial nematodes were detected in 16 samples (28.07%) using microscopic examinations. The molecular detection of filarial species using COI-PCR revealed that 50 samples (87.72%) were positive; these consisted of 33 (57.89%), 13 (22.81%), and 4 (7.02%) samples for D. immitis, B. pahangi, and B. malayi, respectively. While the ITS1-PCR showed that 41 samples (71.93%) were positive—30 samples (52.63%) were identified as containing D. immitis and 11 samples (19.30%) were identified to have B. pahangi, whereas B. malayi was not detected. Forty-seven samples (82.45%) were positive for Wolbachia DNA and the phylogenetic tree of all positive Wolbachia was classified into the supergroup C clade. This study has established fundamental data on filariasis associated with Wolbachia infection in domestic dogs in the Bangkok Metropolitan Region. An extensive survey of dog blood samples would provide valuable epidemiologic data on potential zoonotic filariasis in Thailand. In addition, this information could be used for the future development of more effective prevention and control strategies for canine filariasis in Thailand.