In 1999, the U.S. Geological Survey (USGS) National Wildlife Health Center, Madison, Wisconsin, conducted a diagnostic investigation into a water bird mortality event involving intoxication with avian botulism type C and infection with avian chlamydiosis at the Benton Lake National Wildlife Refuge in Montana, USA.
View Article and Find Full Text PDFIn 2009, Mycobacterium bovis infection was detected in a herd of 60 elk (Cervus elaphus) and 50 fallow deer (Dama dama) in Nebraska, USA. Upon depopulation of the herd, the prevalence of bovine tuberculosis (TB) was estimated at ∼71-75%, based upon histopathology and culture results. Particularly with elk, gross lesions were often severe and extensive.
View Article and Find Full Text PDFHematopoietic malignancies are the most commonly reported neoplasms in lizards, occurring sporadically as in other reptiles. An unusually high incidence of lymphoid neoplasia occurred in a collection of Egyptian spiny-tailed lizards (Uromastyx aegyptius) from 1993-2001. Eight of 15 lizards necropsied at the Louisville Zoological Garden (53%) had multicentric lymphoma.
View Article and Find Full Text PDFVacuolar myelinopathy was confirmed by light and electron microscopic examination of mallards (Anas platyrhynchos), ring-necked ducks (Aythya collaris), and buffleheads (Bucephala albeola) collected during an epizootic at Lake Surf in central North Carolina (USA) between November 1998 and February 1999. Clinical signs of affected birds were consistent with central nervous system impairment of motor function (incoordination, abnormal movement and posture, weakness, paralysis). This is the first report of this disease in wild waterfowl (Anseriformes).
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