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Lepage V.,University of Guelph | Young J.,Toronto Zoo | Dutton C.J.,Toronto Zoo | Crawshaw G.,Toronto Zoo | And 8 more authors.
Journal of Fish Diseases | Year: 2015

Seahorses, pipefish and seadragons are fish of the Family Syngnathidae. From 1998 to 2010, 172 syngnathid cases from the Toronto Zoo were submitted for post-mortem diagnostics and retrospectively examined. Among the submitted species were yellow seahorses Hippocampus kuda Bleeker (n = 133), pot-bellied seahorses Hippocampus abdominalis Lesson (n = 35) and weedy seadragons Phyllopteryx taeniolatus (Lacépède; n = 4). The three most common causes of morbidity and mortality in this population were bacterial dermatitis, bilaterally symmetrical myopathy and mycobacteriosis, accounting for 24%, 17% and 15% of cases, respectively. Inflammatory processes were the most common diagnoses, present in 117 cases. Seven neoplasms were diagnosed, environmental aetiologies were identified in 46 cases, and two congenital defects were identified. © 2014 John Wiley & Sons Ltd. Source


Read J.L.,Khan Research Laboratories | Read J.L.,University of Adelaide | Johnston G.R.,University of South Australia | Morley T.P.,Zoos South Australia
ORYX | Year: 2011

Case studies of well-documented snake reintroductions are limited, despite their potential value for conservation and ecosystem recovery. The Endangered woma Aspidites ramsayi is a large boid snake that has declined considerably and is now threatened throughout much of central Australia. We describe a trial release of captive-bred womas into the feral predator-free Arid Recovery Reserve in northern South Australia. All of the reintroduced womas were killed within 4 months, with predation by the mulga snake Pseudechis australis confirmed or implied in all cases. Lessons learned for the conditioning of captive-bred snakes for wild release and the role of the mulga snake in structuring Australian arid-zone snake assemblages are discussed. © 2011 Fauna & Flora International. Source


Russell S.,Novartis | Tubbs L.,Novartis | McLelland D.J.,Zoos South Australia | LePage V.,University of Guelph | And 3 more authors.
Journal of Fish Diseases | Year: 2015

Amyloid associated with pancreatic adenocarcinoma was discovered in two captive adult tricolour sharkminnows Balantiocheilus melanopterus Bleeker found dead in a freshwater display. Enlarged abdomens expanded by bloody ascitic fluid and grossly visible masses of abnormal tissue were present surrounding sections of the stomach and intestine. Histologically, the masses were composed of areas of well-organized exocrine pancreatic acini interspersed with cords of poorly differentiated, spindle-shaped cells that compressed and effaced normal parenchyma. These cells possessed small numbers of cytoplasmic zymogen granules; the exocrine nature of these cells was confirmed using transmission electron microscopy (TEM). Fibrovascular connective tissue of the hepatopancreas and mesenteries was expanded by lightly eosinophilic, hyaline, homogeneous acellular material. Similar material greatly expanded the tunica media of large blood vessels in the hepatopancreas. After staining with Congo red or thioflavin T, this material exhibited red-green dichroism under polarized light or bright green fluorescence under ultraviolet light (255 nm), respectively. The non-branching fibrils, of indeterminate length, had an approximate diameter of 10-20 nm using TEM. Although exocrine pancreatic neoplasia is relatively common in fish, the presence of amyloid is not. To our current knowledge, the latter has not yet been described in association with a neoplastic lesion in fish. © 2014 John Wiley & Sons Ltd. Source


McLelland D.J.,Zoos South Australia | Reardon T.,South Australian Museum | Dickason C.,Government of South Australia | Kessell A.,Gribbles Veterinary Laboratories | And 3 more authors.
Journal of Wildlife Diseases | Year: 2013

In 2009, an outbreak of white nodular cutaneous lesions was detected in one of only two known breeding colonies of the critically endangered southern bentwing bat (Miniopterus schreibersii bassanii), at Nara-coorte, South Australia. Necropsies were conducted on 10 euthanized bats in September 2009. In October 2009, 123 bats were examined under anesthesia, with skin biopsies collected from 18 affected bats. Prevalence of skin lesions was 45.2%. The prevalence among males was three times greater than among females. The majority of lesions examined histologically were granulomas, typically centered on a nematode. A single lesion had epidermal hyperplasia with intracytoplasmic inclusions consistent with a pox virus; pox virions were identified on electron microscopy. Nematodes dissected from frozen lesions were identified morphologically as Riouxgolvania beveridgei, previously described in the eastern bentwing bat (Miniopterus schreibersii oceanensis). The factors contributing to this apparent disease emergence and outbreak remain undetermined. Lesions consistent with white nose syndrome were not identified. © Wildlife Disease Association 2013. Source


Funnell O.,Adelaide Hills Animal Hospital | Johnson L.,Zoos South Australia | Woolford L.,University of Adelaide | Boardman W.,University of Adelaide | And 3 more authors.
Journal of Wildlife Diseases | Year: 2013

Chlamydiosis is a significant factor contributing to the decline of koala (Phasco-larctos cinereus) populations in Australia but has not previously been reported in South Australia. We describe conjunctivitis in three wild koalas from South Australia, with Chla-mydia pecorum identified by quantitative PCR. © Wildlife Disease Association 2013. Source

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