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Journal articles on the topic 'Veterinary protozoology Marsupials Marsupials'

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Published: 4 June 2021
Last updated: 1 February 2022

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1

Brust, David M. "Gastrointestinal Diseases of Marsupials." Journal of Exotic Pet Medicine 22, no. 2 (April 2013): 132–40. http://dx.doi.org/10.1053/j.jepm.2013.05.005.

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2

Canfield, P. J., and W. J. Hartley. "Tyzzer's disease (Bacillus piliformis) in Australian marsupials." Journal of Comparative Pathology 105, no. 2 (August 1991): 167–73. http://dx.doi.org/10.1016/s0021-9975(08)80072-2.

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3

Fehlberg, Hllytchaikra Ferraz, Pedro de Alcântara Brito Junior, Martín Roberto del Valle Alvarez, Bruno Pereira Berto, and George Rêgo Albuquerque. "Eimeria spp. (Apicomplexa: Eimeriidae) of marsupials (Mammalia: Didelphimorphia) in southern Bahia, Brazil." Revista Brasileira de Parasitologia Veterinária 27, no. 4 (November 8, 2018): 604–8. http://dx.doi.org/10.1590/s1984-296120180062.

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Abstract The occurrence of Eimeria Schneider, 1875 in mammals of the order Didelphimorphia indicates the infection-predisposition of these animals, which in turn is mainly determined for their eating habits. The objective of this work was to evaluate the parasitism of Eimeria spp. in marsupials of the Atlantic Forest of the southern region of Bahia. Fecal samples were collected from marsupials captured in the regions of Ilhéus, Una, Belmonte and Mascote, with traps of the Sherman model (23 × 8 × 9 cm), Tomahawk (50 × 17 × 17 cm) and pitfall and analyzed by Sheather's modified centrifugal-flotation method. Oocysts were identified by microscopical evaluation of their morphology and morphometry. Didelphis aurita Wied-Neuwied, 1826, Gracilinanus agilis Burmeister, 1854, Monodelphis americana Müller, 1776, Marmosa demerarae O. Thomas, 1905 and Marmosa murina Linnaeus, 1758 were parasitized by Eimeria philanderi Lainson & Shaw, 1989 and Eimeria gambai Carini, 1938. Mixed parasitism for these two coccidia was observed in two of the 56 marsupials sampled. In conclusion, this work registers new hosts for E. philanderi and E. gambai, as well as the state of Bahia as a new distribution site for these coccidia.
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4

Suedmeyer, WmKirk. "Life of Marsupials by H. Tyndale-Biscoe." Journal of Zoo and Wildlife Medicine 38, no. 1 (March 2007): 155. http://dx.doi.org/10.1638/1042-7260(2007)38[155:br]2.0.co;2.

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5

Paparini, Andrea, Peter J. Irwin, Kris Warren, Linda M. McInnes, Paul de Tores, and Una M. Ryan. "Identification of novel trypanosome genotypes in native Australian marsupials." Veterinary Parasitology 183, no. 1-2 (December 2011): 21–30. http://dx.doi.org/10.1016/j.vetpar.2011.07.009.

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6

Sukee, Tanapan, Ian Beveridge, and Abdul Jabbar. "Torquenema n. g., Wallabicola n. g., and Macropostrongyloides phascolomys n. sp.: New Genera and a New Species of Nematode (Strongylida: Phascolostrongylinae) Parasitic in Australian Macropodid and Vombatid Marsupials." Animals 11, no. 1 (January 13, 2021): 175. http://dx.doi.org/10.3390/ani11010175.

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The strongyloid nematodes belonging to the subfamily Phascolostrongylinae occur primarily in the large intestines of macropodid and vombatid marsupials. Current molecular evidence suggests that the two nematode species, Macropostrongyloides dissimilis and Paramacropostrongylus toraliformis, from macropodid marsupials are distant from their respective congeners. Furthermore, specimens of Macropostrongyloides lasiorhini from the large intestines of the southern hairy-nosed wombat (Lasiorhinus latifrons) and the common wombat (Vombatus ursinus) are genetically distinct. This study aimed to describe the new genera Torquenema n. g. (with T. toraliforme n. comb. as the type species) from the eastern grey kangaroo, Wallabicola n. g. (with W. dissimilis n. comb. as the type species) from the swamp wallaby and a new species Macropostrongyloides phascolomys n. sp. from the common wombat, using light and scanning electron microscopy.
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7

Jurd, Richard D. "“Not proper mammals”: Immunity in monotremes and marsupials." Comparative Immunology, Microbiology and Infectious Diseases 17, no. 1 (February 1994): 41–52. http://dx.doi.org/10.1016/0147-9571(94)90005-1.

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8

Colle, Ana Cláudia, Ravena Fernanda Braga de Mendonça, Maerle Oliveira Maia, Leodil da Costa Freitas, Rute Witter, Arlei Marcili, Daniel Moura de Aguiar, et al. "Molecular survey of tick-borne pathogens in small mammals from Brazilian Amazonia." Revista Brasileira de Parasitologia Veterinária 28, no. 4 (December 2019): 592–604. http://dx.doi.org/10.1590/s1984-29612019086.

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Abstract Small non-volant mammals (marsupials and small rodents) were captured at three different timepoints from 23 forest fragments across three municipalities (Alta Floresta, Sinop and Cláudia) covering the Amazonian biome of the Mato Grosso State in Midwestern Brazil. The animal tissues (liver and spleen) and blood were screened using molecular tools for the detection of Babesia, Coxiella, Cytauxzoon, Hepatozoon, Theileria, and Anaplasmataceae agents. A total of 230 specimens (78 rodents and 152 marsupials) were trapped. Hepatozoon and Piroplasmorida agents were detected in the common opossums (Didelphis marsupialis). In turn, all samples (blood, liver, or spleen) collected from the small mammals were negative for the genus Coxiella and the family Anaplasmataceae, as detected by polymerase chain reaction (PCR). Phylogenetic analyses inferred from partial sequences of the 18S rRNA gene highlighted the occurrence of new Hepatozoon and Piroplasmorida haplotypes. Future studies determining the role of common opossum (D. marsupialis) in the epidemiological cycles of Hepatozoon and Babesia under natural conditions in the Amazonian biome are necessary.
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9

Hillman, Alison, and R. C. Andrew Thompson. "Interactions between humans and urban-adapted marsupials on private properties in the greater Perth region." Australian Mammalogy 38, no. 2 (2016): 253. http://dx.doi.org/10.1071/am15045.

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This study documents a range of interactions between humans and quenda (Isoodon obesulus) and brushtail possums (Trichosurus vulpecula) in urbanised Perth, Australia. These interactions are of veterinary public health significance. Findings suggest that public education is important to safeguard the health of both the marsupials and humans involved in such interactions.
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10

Rupan, Rodrick, Amy V. Jennison, Helen V. Smith, and Rowland N. Cobbold. "Carriage of Shiga-toxigenic Escherichia coli by native marsupials in Australia." Veterinary Microbiology 155, no. 2-4 (March 2012): 279–83. http://dx.doi.org/10.1016/j.vetmic.2011.08.013.

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11

Kusewitt, D. F., R. L. Reece, and K. B. Miska. "S-100 Immunoreactivity in Melanomas of Two Marsupials, a Bird, and a Reptile." Veterinary Pathology 34, no. 6 (November 1997): 615–18. http://dx.doi.org/10.1177/030098589703400610.

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S-100 proteins are abundant in melanocytes of the skin; thus, S-100 immunoreactivity has been used as a diagnostic criterion for melanoma in humans and other placental mammals. We tested cutaneous melanomas of two marsupials, a bird, and a snake for S-100 immunoreactivity, using a polyclonal rabbit antibovine S-100 antibody. The tumor from a Tasmanian Pademelon ( Thylogale billardierii) was composed of large epithelioid cells, most of which had S-100–positive cytoplasm. In general, there were only scattered individual spindle-shaped S-100–positive cells or groups of cells in the primary mass from a Spotted-tailed Quoll ( Dasyurus maculates); S-100 staining was primarily nuclear. Cells comprising the melanomas of the Australian Cormorant ( Phalacrocorax carbo) and the Death Adder ( Acanthophis antarcticus) were S-100–negative, although peripheral nerve bundles in both were S-100–positive.
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12

Tsunekawa, Naoki, Takao Nishida, and Hirokazu Fujimoto. "Expression of the Spermatid-Specific Hsp70 Antigen is Conserved in Mammals Including Marsupials." Journal of Veterinary Medical Science 61, no. 4 (1999): 381–88. http://dx.doi.org/10.1292/jvms.61.381.

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13

Cusack, Lara, Daniel Cutler, and Joerg Mayer. "THE USE OF THE LIGASURE™ DEVICE FOR SCROTAL ABLATION IN MARSUPIALS." Journal of Zoo and Wildlife Medicine 48, no. 1 (March 2017): 228–31. http://dx.doi.org/10.1638/2016-0069.1.

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14

Canfield, P. J., W. J. Hartley, and G. L. Reddacliff. "Spontaneous proliferations in Australian Marsupials—a survey and review. 2. Dasyurids and bandicoots." Journal of Comparative Pathology 103, no. 2 (August 1990): 147–58. http://dx.doi.org/10.1016/s0021-9975(08)80171-5.

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15

Carossino, Mariano, Rudy Bauer, Mark A. Mitchell, Charles O. Cummings, Anke C. Stöhr, Nobuko Wakamatsu, Kimberly Harper, et al. "Pathologic and immunohistochemical findings in an outbreak of systemic toxoplasmosis in a mob of red kangaroos." Journal of Veterinary Diagnostic Investigation 33, no. 3 (March 19, 2021): 554–65. http://dx.doi.org/10.1177/10406387211001869.

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Toxoplasma gondii is a zoonotic protozoan pathogen that infects many endothermic vertebrates, including humans; the domestic cat and other felids serve as the definitive host. Macropodids are considered highly susceptible to toxoplasmosis. Here, we describe the clinical, pathologic, and immunohistochemical findings of an outbreak of systemic toxoplasmosis in a mob of 11 red kangaroos ( Macropus rufus), with high morbidity (73%) and mortality (100%) rates. Affected animals had either severe and rapidly deteriorating clinical conditions or sudden death, which was correlated with widespread necrotizing lesions in multiple organs and intralesional T. gondii organisms identified via MIC3-specific immunohistochemistry and confirmed by REP529-specific rtPCR. Quantification of parasites demonstrated the highest parasite density in pulmonary parenchyma compared with other tissues. Our study highlights the continued importance of this severe condition in Australian marsupials.
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16

Orozco, María Marcela, Luciano Miccio, Gustavo Fabián Enriquez, Fabián Eduardo Iribarren, and Ricardo Esteban Gürtler. "SEROLOGIC EVIDENCE OF CANINE PARVOVIRUS IN DOMESTIC DOGS, WILD CARNIVORES, AND MARSUPIALS IN THE ARGENTINEAN CHACO." Journal of Zoo and Wildlife Medicine 45, no. 3 (September 2014): 555–63. http://dx.doi.org/10.1638/2013-0230r1.1.

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17

Hillman, Alison E., Amanda L. Ash, Amanda R. Kristancic, Aileen D. Elliot, Alan J. Lymbery, Ian D. Robertson, and R. C. Andrew Thompson. "Validation of various parasite detection tests for use in the Australian marsupials quenda (Isoodon obesulus) and brushtail possums (Trichosurus vulpecula)." Journal of Veterinary Diagnostic Investigation 29, no. 1 (December 8, 2016): 64–75. http://dx.doi.org/10.1177/1040638716674509.

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18

Massini, Paula Fernanda, Ricardo Nascimento Drozino, Flávio Haragushiku Otomura, Anna Claudia Baumel Mongruel, Jessica Damiana Marinho Valente, Max Jean de Ornelas Toledo, Thiago Fernandes Martins, Odilon Vidotto, Thállitha Samih Wischral Jaime Vieira, and Rafael Felipe da Costa Vieira. "Detection of Hemotropic Mycoplasma sp. in white-eared opossums (Didelphis albiventris) from Southern Brazil." Revista Brasileira de Parasitologia Veterinária 28, no. 4 (December 2019): 797–801. http://dx.doi.org/10.1590/s1984-29612019058.

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Abstract Opossums are marsupials from the New World of the genus Didelphis and known as synanthropic animals due to their proximity with human beings. To date, ‘Candidatus Mycoplasma haemodidelphis’ has been solely found infecting the North American opossum (Didelphis virginiana). Accordingly, the aim of this study was to screen eight white-eared opossums (Didelphis albiventris) from a public park in Maringa city, Paraná State, southern Brazil, for hemoplasma infection. Blood samples were taken from caudal venipuncture, and DNA was extracted and further screened by a pan-hemoplasma PCR assay. Seven out of eight (87.50%; CI 95%: 47.35-99.68%) white-eared opossums were positive for Mycoplasma spp. Sequencing of the 16S rRNA fragment showed 98,97% identity with ‘Ca. M. haemodidelphis’ detected in the USA. Three out of eight (37.50%; CI 95%: 8.52-75.51%) white-eared opossums were infested by Amblyomma dubitatum ticks. This is the first report on detection of a potentially novel hemotropic Mycoplasma sp. infecting opossums from South America.
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19

Jacinavicius, Fernando de Castro, Ricardo Bassini-Silva, Sebastián Muñoz-Leal, Cal Welbourn, Ronald Ochoa, Marcelo Bahia Labruna, and Darci Moraes Barros-Battesti. "Molecular detection of Rickettsia genus in chigger mites (Trombidiformes: Trombiculidae) collected on small mammals in southeastern brazilian." Revista Brasileira de Parasitologia Veterinária 28, no. 4 (December 2019): 563–68. http://dx.doi.org/10.1590/s1984-29612019069.

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Abstract Chiggers are ectoparasites of vertebrates and may cause trombiculiasis or transmit pathogens to their hosts. Specimens collected from rodents and marsupials were morphologically identified as Herpetacarus hertigi, Eutrombicula tinami, Kymocta sp., Quadraseta brasiliensis, Quadraseta falconensis, Quadraseta flochi, Quadraseta mackenziei, Quadraseta pazca, Quadraseta trapezoides, Quadraseta sp., Serratacarus sp., and Trombewingia bakeri. These mites were submitted individually to molecular analyses for the detection of bacteria of the genus Coxiella, Hepatozoon and Rickettsia. Samples were positive to Rickettsia only. Obtained sequences for the gltA (350 pb) and ompA (488 pb) genes were identical to “Candidatus Rickettsia colombianensi”, a species previously detected in ticks. In addition, molecular identification of mites based on 18S rDNA sequences are provided for H. hertigi, Kymocta sp., Q. brasiliensis, Q. pazca, Q. trapezoides, Quadraseta sp., and T. bakeri for the first time. This is the first report of the detection of a Rickettsia sp. in chigger mites collected on rodents in Brazil.
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20

Pantoja, Bruna Tassia Santos, Armando Reinaldo Marques Silva, Renata Mondego-Oliveira, Thamires Santos Silva, Babara Carvalho Marques, Rafaela Pontes Albuquerque, Joicy Cortez Sá Sousa, et al. "Morphological study of larynx, trachea, and lungs of Didelphis marsupialis (LINNAEUS, 1758)." October-2020 13, no. 10 (2020): 2142–49. http://dx.doi.org/10.14202/vetworld.2020.2142-2149.

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Background and Aim: From a biomedical point of view, the value of marsupials as a model of primitive mammals is indisputable. Among its species, the possum is a model that allows the study of the ontogeny of different organic systems, as well as their physiological aspects. The relevance of anatomical, functional, evolutionary, and phylogenetic study of marsupials for the development of comparative morphology is extensively documented in the literature. However, there are still many aspects to be further evaluated, as the anatomy and histology of the respiratory tract of this species. The aim of this study was to describe the morphology of the larynx, trachea, and lungs of Didelphis marsupialis. Materials and Methods: Five adult male animals were donated to the Comparative Animal Anatomy Laboratory – LAAC/ CCAA-UFMA, for morphological studies. Specimens were washed in running water to perform biometrics. Then, they were fixed with 10% formaldehyde solution. After the fixation period, the specimens were positioned in dorsal decubitus position, for dissection of the respiratory system organs, by opening the ventral region of the neck and thoracic cavity, with subsequent removal of the pectoral muscles, ribs, and sternum. For histological analysis, fragments of 1 cm2 of the larynx (epiglottis and thyroid cartilages), trachea, and lungs were collected and fixed in 10% formaldehyde solution. Right after fixation, the fragments were dehydrated in increasing concentrations of ethyl alcohol (70, 80, 95, and 100%), diaphanized in xylene, embedded in paraffin, and sectioned into thin slices of 5 μm using a microtome. Sections were stained using the hematoxylin and eosin technique. Results: Anatomically, the larynx starts right after the pharynx. It consisted of four cartilages: Epiglottis, cricoid, thyroid, and arytenoid. The trachea was made of dorsally incomplete cartilaginous rings. At the entrance of the thoracic cavity, it bifurcated into the left and right main bronchus. The left lung was smaller than the right lung, with two lobes (cranial and caudal). The right lung presents the cranial, middle, caudal, and accessory lobes. Histologically, the epiglottis consisted of elastic cartilage and is covered by a non-keratinized stratified squamous epithelium. Thyroid cartilage is made of hyaline cartilage covered by smooth muscle. The trachea presents hyaline cartilage, with ciliated pseudo-stratified epithelium, serous glands, isogenic groups of chondrocytes, and perichondrium. The lung consisted of bronchi, bronchioles, and alveoli, also presenting blood vessels and arteries. Conclusion: Morphologically, the larynx, trachea, and lungs of D. marsupialis were similar to those of the other Didelphids described in the literature.
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Meneses, Iris Daniela Santos de, Müller Ribeiro Andrade, Rosângela Soares Uzêda, Marta Vasconcelos Bittencourt, David Scott Lindsay, and Luís Fernando Pita Gondim. "Frequency of antibodies against Sarcocystis neurona and Neospora caninum in domestic cats in the state of Bahia, Brazil." Revista Brasileira de Parasitologia Veterinária 23, no. 4 (December 2014): 526–29. http://dx.doi.org/10.1590/s1984-29612014080.

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Sarcocystis neurona is the major agent of equine protozoal myeloencephalitis. It infects several mammalian species in the Americas, where the definitive hosts, marsupials of the genus Didelphis (D. virginiana and D. albiventris) are found. Domestic cats are one of the confirmed intermediate hosts of the parasite; however, antibodies against S. neurona had never before been demonstrated in Brazilian cats. The aim of this study was to determine whether cats in Bahia, Brazil, are exposed to the parasite. A total of 272 feline serum samples (134 from feral and 138 from house cats) were subjected to an indirect fluorescent antibody test using cultured merozoites of S. neurona as antigen. Positivity was detected in 4.0% (11/272) of the tested samples, with titers ranging from 25 to 800. The feline sera were also tested for antibodies against the protozoan Neospora caninum, with an observed antibody frequency of 2.9%. To the author's knowledge, this is the first study to report antibodies against S. neurona in Brazilian cats. We conclude that cats are exposed to the parasite in the region of this study. Further investigations are needed to confirm the role of cats in the transmission cycle of S. neurona in Brazil.
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22

Gharibi, S., L. Vogelnest, and M. Govendir. "In vitro binding of cefovecin to plasma proteins in Australian marsupials and plasma concentrations of cefovecin following single subcutaneous administration to koalas (Phascolarctos cinereus )." Australian Veterinary Journal 97, no. 3 (February 26, 2019): 75–80. http://dx.doi.org/10.1111/avj.12785.

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23

CASSIDY, ANGELA, RACHEL MASON DENTINGER, KATHRYN SCHOEFERT, and ABIGAIL WOODS. "Animal roles and traces in the history of medicine,c.1880–1980." BJHS Themes 2 (2017): 11–33. http://dx.doi.org/10.1017/bjt.2017.3.

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AbstractThis paper argues for the need to create a more animal-centred history of medicine, in which animals are considered not simply as the backdrop for human history, but as medical subjects important in and of themselves. Drawing on the tools and approaches of animal and human–animal studies, it seeks to demonstrate, via four short historical vignettes, how investigations into the ways that animals shaped and were shaped by medicine enables us to reach new historical understandings of both animals and medicine, and of the relationships between them. This is achieved by turning away from the much-studied fields of experimental medicine and public health, to address four historically neglected contexts in which diseased animals played important roles: zoology/pathology, parasitology/epidemiology, ethology/psychiatry, and wildlife/veterinary medicine. Focusing, in turn, on species that rarely feature in the history of medicine – big cats, tapeworms, marsupials and mustelids – which were studied, respectively, within the zoo, the psychiatric hospital, human–animal communities and the countryside, we reconstruct the histories of these animals using the traces that they left on the medical-historical record.
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24

Díaz, Anahí G., Paula G. Ragone, Fanny Rusman, Noelia Floridia-Yapur, Rubén M. Barquez, M. Mónica Díaz, Nicolás Tomasini, and Patricio Diosque. "A Novel Genotype and First Record of Trypanosoma lainsoni in Argentina." Pathogens 9, no. 9 (September 4, 2020): 731. http://dx.doi.org/10.3390/pathogens9090731.

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Trypanosomes are a group of parasitic flagellates with medical and veterinary importance. Despite many species having been described in this genus, little is known about many of them. Here, we report a genetic and morphological characterization of trypanosomatids isolated from wild mammals from the Argentine Chaco region. Parasites were morphologically and ultrastructurally characterized by light microscopy and transmission electron microscopy. Additionally, 18s rRNA and gGAPDH genes were sequenced and analyzed using maximum likelihood and Bayesian inference. Morphological characterization showed clear characteristics associated with the Trypanosoma genus. The genetic characterization demonstrates that the studied isolates have identical sequences and a pairwise identity of 99% with Trypanosoma lainsoni, which belongs to the clade of lizards and snakes/rodents and marsupials. To date, this species had only been found in the Amazon region. Our finding represents the second report of T. lainsoni and the first record for the Chaco region. Furthermore, we ultrastructurally described for the first time the species. Finally, the host range of T. lainsoni was expanded (Leopardus geoffroyi, Carenivora, Felidae; and Calomys sp., Rodentia, Cricetidae), showing a wide host range for this species.
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Monteiro, R. M., L. B. Keid, L. J. Richtzenhain, S. Y. Valadas, G. Muller, and R. M. Soares. "Extensively variable surface antigens of Sarcocystis spp. infecting Brazilian marsupials in the genus Didelphis occur in myriad allelic combinations, suggesting sexual recombination has aided their diversification." Veterinary Parasitology 196, no. 1-2 (September 2013): 64–70. http://dx.doi.org/10.1016/j.vetpar.2013.01.019.

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26

Kociánová, I., A. Gorošová, F. Tichý, P. Čížek, and M. Machálka. "Structure of Masera's Septal Olfactory Organ in Cat (Felis silvestris f. catus) - Light Microscopy in Selected Stages of Ontogeny." Acta Veterinaria Brno 75, no. 4 (2006): 471–75. http://dx.doi.org/10.2754/avb200675040471.

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The septal organ /SO/ (Masera's organ /MO/) is a chemoreceptor presently considered one of three types of olfactory organs (along with the principal olfactory region and vomeronasal organ). Notwithstanding the septal organ having been first described by Rodolfo Masera in 1943, little is known of the properties of sensory neurons or of its functional significance in chemoreception. Until now the septal organ has been described only in laboratory rodents and some marsupials. This work refers to its existence in the domestic cat (Felis silvestris f. catus). The septal organ can be identified at the end of embryonic period - 27 or 28 days of ontogenesis in cats (the 6th developmental stage of Štěrba) - coincident with formation of the principal olfactory region in nasal cavity. At 45 days of ontogenesis (the 9th developmental stage of Štěrba), this septal olfactory organ is of circular or oval shape, 120 μm in diameter, in ventral part of septum nasi, lying caudally to the opening of ductus incisivus. The structure of the epithelium of septal olfactory organ is clearly distinct from the respiratory epithelium of the nasal cavity. It varies in thickness, cellular composition, as well as free surface appearance, and even lack the typical structure of sensory epithelium, in this developmental period. Nerve bundles and glandular acini are lacking in the lamina propria mucosae of the septal organ and in the adjacent tissues. Glands appear as the single non-luminized cords of epithelia extending from the surface. The adjacent respiratory epithelium contains numerous goblet cells.
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Borel, Nicole, Adam Polkinghorne, and Andreas Pospischil. "A Review on Chlamydial Diseases in Animals: Still a Challenge for Pathologists?" Veterinary Pathology 55, no. 3 (January 8, 2018): 374–90. http://dx.doi.org/10.1177/0300985817751218.

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Chlamydiae have a worldwide distribution causing a wide range of diseases in human hosts, livestock, and companion animals as well as in wildlife and exotic species. Moreover, they can persist in their hosts as asymptomatic infections for extended periods of time. The introduction of molecular techniques has revolutionized the Chlamydia field by expanding the host range of known chlamydial species but also by discovering new species and even new families of bacteria in the broader order Chlamydiales. The wide range of hosts, diseases, and tissues affected by chlamydiae complicate the diagnosis such that standard diagnostic approaches for these bacteria are rare. Bacteria of the Chlamydiales order are small and their inclusions are difficult to detect by standard microscopy. With the exception of avian and ovine chlamydiosis, macroscopic and/or histologic changes might not be pathognomic or indicative for a chlamydial infection or even not present at all. Moreover, detection of chlamydial DNA in specimens in the absence of other methods or related pathological lesions questions the significance of such findings. The pathogenic potential of the majority of recently identified Chlamydia-related bacteria remains largely unknown and awaits investigation through experimental or natural infection models including histomorphological characterization of associated lesions. This review aims to summarize the historical background and the most important developments in the field of animal chlamydial research in the past 5 years with a special focus on pathology. It will summarize the current nomenclature, present critical thoughts about diagnostics, and give an update on chlamydial infections in domesticated animals such as livestock, companion animals and birds, as well as free-ranging and captive wild animals such as reptiles, fish, and marsupials.
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OWEN, IFOR L. "Parasites of animals in Papua New Guinea recorded at the National Veterinary Laboratory: a catalogue, historical review and zoogeographical affiliations." Zootaxa 3143, no. 1 (December 23, 2011): 1. http://dx.doi.org/10.11646/zootaxa.3143.1.1.

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The catalogue includes more than 700 parasites of domestic and wild animals recorded at the National Veterinary Laboratory, Papua New Guinea, since data began to be gathered at the end of World War 2. It incorporates some information already published and data on parasites, particularly of indigenous fauna, not recorded previously in the country. Wildlife host species include wild pig, deer, bats, murine rodents, marsupials, monotremes, birds, reptiles, amphibians, fishes and invertebrates. The range of parasites in domestic and many wild animals shows great affinity with that found in Australia. Some notable exceptions amongst domestic animal parasites are the endoparasites Trichinella papuae, Capillaria papuensis and Mammomonogamus laryngeus and the economically significant ectoparasites Chrysomya bezziana, Tropilaelaps mercedesae and Varroa jacobsoni that are not recorded in Australia. Unusual host-parasite associations include the larvae of the insects Chrysomya spp. and Lucilia sp., parasites of warm-blooded animals, infesting, respectively, cold-blooded crocodiles and cane toads, and the mammalian mite, Sarcoptes scabiei, on an avian host, cassowaries. No host switching of helminths was seen between domestic and wild animals, or between populations of deer, wild pigs and wallabies when grazing together. The economic importance of certain parasites for domestic animals, the potential threats from introduced or newly-discovered parasites, and the relationship between some parasites and their wildlife hosts, are discussed. Information is presented in two tables: a parasite–host list that includes the location of a parasite in or on a host as well as a list of references of relevance to the country, and a host–parasite list that contains the distribution of the parasites according to province or locality.
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Jackson, AE. "In this issue - March 2019: Clinical review of feline viral diagnosis · Vaccination reactions in experimental sheep · Swimming excercise in Standardbreds · Bone fragments in young Thoroughbreds · Cefovecin in marsupials · Mycobacteriosis in captive brolga." Australian Veterinary Journal 97, no. 3 (February 26, 2019): 43–44. http://dx.doi.org/10.1111/avj.12793.

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Brito Junior, Pedro de Alcântara, Josiane Moreira Rocha, Caroline Araújo da Silva, Priscylla Marcelly Vilanova Oliveira, Joelande Esquivel Correia, Luciara Alves da Cruz, Anaiá da Paixão Sevá, et al. "Survey of anti-Toxoplasma gondii antibodies in wild mammals captured from Atlantic Forest fragments in Bahia, northeastern Brazil." Revista Brasileira de Parasitologia Veterinária 29, no. 4 (2020). http://dx.doi.org/10.1590/s1984-29612020083.

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Abstract The objective of this study was to investigate the frequency of antibodies to Toxoplasma gondii present in wild mammals that were trap captured in forest fragments in the State of Bahia, northeastern Brazil. A total of 368 individuals (246 rodents, 104 marsupials and 18 bats) were captured using live catch traps. Serum samples were tested using the modified agglutination test, with a cut-off point at 1:25 dilution. The total occurrence of antibodies to T. gondii was 10.6% (39/368), being 16.3% (17/104) in marsupials, 8.5% (21/246) in rodents, and 5.5% (1/18) in bats. Antibody titers varied between 25 and 50 for rodents, between 25 and 400 for marsupials, and were 25 for bats. This is the first report on antibodies to T. gondii in certain rodent species (Thaptomys nigrita, Hylaeamys laticeps, and Cerradomys subflavus), marsupial species (Monodelphis americana, Gracilinanus microtarsus, Gracilinanus agilis and Marmosops incanus), and bats of the genus Rhynchonycteris. The presence of antibodies to T. gondii in wild mammals demonstrates the possibility of these animals as sentinels of toxoplasmosis, especially on regions under high anthropogenic effect.
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de Castro Jacinavicius, Fernando, Ricardo Bassini-Silva, Matheus Huang-Bastos, Maurício Claudio Horta, and Darci Moraes Barros-Battesti. "New Species of Chiggers (Trombidiformes: Trombiculidae and Leeuwenhoekiidae) From the Conservation Unit Parque Nacional da Serra das Confusões, Brazil." Journal of Medical Entomology, September 17, 2020. http://dx.doi.org/10.1093/jme/tjaa178.

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Abstract The Piauí State, Brazil, has never had its chigger fauna recorded. In this study, we examined chiggers collected on marsupials, rodents, and lizards from the conservation unit Parque Nacional da Serra das Confusões (PNSC). Herein we describe four new species, Paraguacarus klompenin. sp., Neoschoengastia ochoain. sp., Quadraseta welbournin. sp., and Susa bauchanin. sp. Furthermore, an additional seven species are reported: Eutrombicula alfreddugesi (Oudemans, 1910), Microtrombicula brachytrichiaBrennan, 1971, Microtrombicula rhipidomysiGoff, Whitaker and Dietz, 1983, Parascoschoengastia aemulata (Brennan and Jones, 1964), Parasecia validaBrennan, 1969, Pseudochoengastia petrolinensis Jacinavicius, Bassini-Silva and Barros-Battesti 2019, and Quadraseta flochi (Brennan and Jones, 1960). This is the first report of chiggers in Piauí State, which includes one of the most biodiverse areas in the Caatinga biome and is of particular importance to conservation. The genera Paraguacarus Goff and Whitaker, 1984 and Susa Audy and Nadcharam, 1960 are reported here for the first time to Brazil.
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Bezerra-Santos, Marcos Antônio, Rafael Antonio Nascimento Ramos, Artur Kanadani Campos, Filipe Dantas-Torres, and Domenico Otranto. "Didelphis spp. opossums and their parasites in the Americas: A One Health perspective." Parasitology Research, March 31, 2021. http://dx.doi.org/10.1007/s00436-021-07072-4.

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AbstractMedium sized opossums (Didelphis spp.) are among the most fascinating mammals of the Americas, playing important ecological roles (e.g., dispersal of seeds and control of insect populations) in the environment they inhabit. Nevertheless, as synanthropic animals, they are well adapted to human dwellings, occupying shelters within the cities, peripheral areas, and rural settings. These marsupials can harbor numerous pathogens, which may affect people, pets, and livestock. Among those, some protozoa (e.g., Leishmania infantum, Trypanosoma cruzi, Toxoplasma gondii), helminths (e.g., Ancylostoma caninum, Trichinella spiralis, Alaria marcianae, Paragonimus spp.) and arthropods (e.g., ticks, fleas) present substantial public health and veterinary importance, due to their capacity to cause disease in humans, domestic animals, and wildlife. Here, we reviewed the role played by opossums on the spreading of zoonotic parasites, vectors, and vector-borne pathogens, highlighting the risks of pathogens transmission due to the direct and indirect interaction of humans and domestic animals with Didelphis spp. in the Americas.
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Magalhães, L., H. Silveira, S. Prestes, L. K. Costa Magalhães, R. A. Santana, R. Ramasawmy, J. Oliveira, et al. "Bioecological aspects of triatomines and marsupials as wild Trypanosoma cruzi reservoirs in urban, peri‐urban and rural areas in the Western Brazilian Amazon." Medical and Veterinary Entomology, January 4, 2021. http://dx.doi.org/10.1111/mve.12507.

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34

Utami, Prasetyarti, Bambang Heru Budianto, and Ana Sahara. "Tick (Acari: Ixodidae) infestation of cuscuses from Maluku Province, Indonesia." Veterinary World, June 8, 2021, 1465–71. http://dx.doi.org/10.14202/vetworld.2021.1465-1471.

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Background and Aim: Cuscuses are one of the endemic Indonesian marsupials, which needs to be protected and revived in terms of the numbers and range of species. Ectoparasites of ticks (Ixodidae) are one potential obstacle to cuscus conservation. Tick infestation can cause blood loss in the host, even being a predisposing factor for infection with pathogenic organisms. This study aimed to determine the prevalence, infestation intensity, and species of ticks present on cuscuses in Maluku Province, Indonesia. Materials and Methods: Ticks were collected from cuscuses origin of the four regions in Maluku Province, namely the island of Ambon, Seram Island, Romang Island, and Wetar Island . Cuscuses were captured at night, with ticks being collected from them from the head to the tip of the tail. The tick samples obtained from the cuscuses were preserved, identified, and counted. Cuscuses were released back into their habitat after collecting the ticks. The obtained ticks were observed using an Olympus BX51 microscope with an Olympus DP12 digital camera and prepared for examination under a scanning electron microscope (SEM). Infestation rate, infestation intensity, and morphology of the species were described. Results: The cuscuses were found to be infested with Ixodes cordifer ticks. Cuscuses in Maluku Province had a low tick infestation rate. The range of infestation prevalence of island origin cuscuses in Maluku was between 14.28% and 16.67%. Simultaneously, I. cordifer infestation level was mildly infested based on the intensity of thick infestation ranged from 1 to 1.2 ticks per cuscus. From observation of the tick surface structure under SEM, sexual dimorphism and various specific characteristics of the ticks were identified. Conclusion: The low infestation rate of I. cordifer ticks in cuscus was influenced by the up and down movement of the conscious activity in the tree, which allowed minimal contact with the ticks. The infestation prevalence rates on each island studied were similar. Such similarities of infestation are related to the similarity of cuscus species among Ambon, Lakor, Seram, and Romang islands, which are all included in the Phalangeridae family, and their similar habitats, behaviors, climatic conditions, and geographical areas.
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Gonçalves, Luiz Ricardo, Giane Paludo, Talita Barcelos Bisol, Lívia Perles, Laryssa Borges de Oliveira, Camila Manoel de Oliveira, Thiago Merighi Vieira da Silva, et al. "Molecular detection of piroplasmids in synanthropic rodents, marsupials, and associated ticks from Brazil, with phylogenetic inference of a putative novel Babesia sp. from white-eared opossum (Didelphis albiventris)." Parasitology Research, August 27, 2021. http://dx.doi.org/10.1007/s00436-021-07284-8.

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