Common Diseases of Urban Wildlife: Reptiles

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Common Diseases of Urban Wildlife: Reptiles The Australian Registry of Wildlife Health is committed to the preservation of Australia's biodiversity through increased understanding of the interaction among animals, the environment, and disease causing agents. Production of this document was made possible by: Wildlife Rescue and Rehabilitation – an Australian Government initiative Cite this document as: Hall, J. and Rose, K. 2021. Common Diseases of Urban Wildlife: Reptiles. Taronga Conservation Society Australia, Sydney. All Images are subject to Copyright© The information and materials contained in this section of the site are subject to copyright and are for individual educational use only. Authorisation should be sought from the Registry for any other use of these materials. The views expressed in this document are those of the authors, and not necessarily of their organisations. The Registry makes every effort to verify the information contained within this document, but the accuracy and completeness of the information cannot be guaranteed. The reader assumes all risk in using information provided. This document contains images of sick and dead wildlife. These images are included for the sole purpose of improving wildlife care and welfare. If you have any concerns regarding information contained in this document, please contact the Registry directly. 1 | Page Contents 1 List of Images .................................................................................................................................. 4 2 Introduction .................................................................................................................................... 6 3 Parasitic Disease.............................................................................................................................. 6 3.1 Ectoparasites ........................................................................................................................... 6 3.2 Endoparasites .......................................................................................................................... 8 3.2.1 Gastrointestinal parasites ............................................................................................... 8 3.2.2 Blood parasites .............................................................................................................. 10 3.2.3 Protozoa ........................................................................................................................ 11 4 Bacterial diseases .......................................................................................................................... 13 4.1 Salmonellosis ........................................................................................................................ 13 4.2 Mycobacteriosis .................................................................................................................... 14 4.3 Enterococcus lacertideformus in skinks and geckos ............................................................. 15 4.4 Dermatophilosis .................................................................................................................... 16 5 Viral diseases ................................................................................................................................. 16 5.1 Nidoviruses ........................................................................................................................... 16 5.1.1 Bellinger River Virus ...................................................................................................... 16 5.1.2 Bobtail flu (Shingleback nidovirus-1) ............................................................................ 17 5.1.3 Snake nidovirus ............................................................................................................. 17 5.2 Adenoviruses ......................................................................................................................... 18 5.3 Paramyxovirus ....................................................................................................................... 18 5.3.1 Sunshine virus ............................................................................................................... 18 6 Fungal diseases ............................................................................................................................. 18 6.1 Mycotic and other dermatoses ............................................................................................. 18 6.1.1 Nannizziopsis ................................................................................................................. 19 7 Nutritional Disease ........................................................................................................................ 20 7.1 Nutritional Osteodystrophy (metabolic bone disease) ......................................................... 20 7.1.1 Severe emaciation in chelonians .................................................................................. 21 8 Traumatic Injury ............................................................................................................................ 22 8.1 Shock ..................................................................................................................................... 22 8.2 Soft Tissue Injury including bite wounds .............................................................................. 22 8.3 Cloacal or penile prolapse ..................................................................................................... 23 8.4 Shell Injury ............................................................................................................................ 23 8.5 Tail injuries ............................................................................................................................ 24 9 Diseases of Unknown Aetiology .................................................................................................... 24 9.1 Neoplasia............................................................................................................................... 24 2 | Page 10 Species mentioned in text ......................................................................................................... 25 11 References ................................................................................................................................ 27 3 | Page 1 List of Images Figure 1 a) Central netted dragon cloacal mites (Image: P Thompson), b) orange mites clustered around toenails of a wild Asian house gecko, and c) orange mites under scales along the ventral tail of a wild Asian house gecko .................................................................................................................... 7 Figure 2 a) Engorged adults and nymphs, Amblyomma moreliae, causing b) anaemia in a wild eastern water dragon, and c) camouflaged ticks on the ventral surface of a lace monitor ................................ 7 Figure 3 a, b) A ball of leeches in the axillary area of a Bellinger River Snapping Turtle (b, arrows), and b) invertebrate eggs (unknown species) glued over the surface of the plastron and underside of carapace (asterisk) .................................................................................................................................. 7 Figure 4 Various reptile faecal parasites a) strongyle-type ova, b) strongyle larvae, c) ascarid ovum, d) oxyurid ovum, e) oxyurid ovum, f) capillaria ovum, g) cestode ovum (note characteristic hooklets), h) encysted Nyctotherus sp. ciliate, i) Nyctotherus sp. ciliate. Images courtesy of P. Thompson. ............. 8 Figure 5 Eastern water dragon with a) profound anaemia caused by a severe co-infection of ticks and (b,c) Abbreviata physignathi nematodes in the stomach ....................................................................... 9 Figure 6 Marine turtles with a) aortic aggregate of adult trematodes, b) adult trematodes (arrow) and serosal granulomas (asterisk) in small intestine, c) adult trematodes along mucosal surface of small intestine, d) serosal granulomas, e) adult trematodes in stomach (black arrow), and f) adult trematodes in small intestine (arrows) ................................................................................................. 10 Figure 7 Marine turtle histopathology (H&E) a) trematode ova in spleen, b) trematode ova in aorta, and c) adult trematode in small intestinal lumen ................................................................................. 10 Figure 8 Trematodes seen a) in a faecal float, b) on a wet preparation of a serosal surface scrape of small intestine, c) excysting trematodes on serosal surface scrape of small intestine, and d) adult trematodes viewed under a dissecting microscope ............................................................................. 10 Figure 9 Haemogregarine parasite within a red cell identified on blood smear, Diamond Python. Image courtesy of P. Thompson. .......................................................................................................... 11 Figure 10 Microsporidia, central knob-tail gecko ................................................................................. 11 Figure 11 Cryptosporidia spp. Faecal sample, Inland Taipan. Modified Zeihl-Neilsen stain................. 12 Figure 12 a) unsporulated and b) sporulated coccidia (Isospora) in faeces, and c) unsporulated Schellackia-like coccidian and d) sporulated
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