Mycobacteriosis in a Nile crocodile (Crocodylus niloticus) from Turkey

In this case, mycobacteriosis in a Nile crocodile’s tissues, which were sent from a private zoo, was described pathomorphologically and immunohistochemically. Macroscopically; multifocal, greyish-white areas were observed in the sent lung, liver and spleen. Histologically, a large number of well-demarcated necrotic areas were seen. These areas included nuclei debris locally. Moderate inflammatory cells and a couple of multinucleated giant cells surrounded the necrotic cores. Numerous acid-fast bacilli were detected by Ziehl-Neelsen staining method. Immunolabelling for both Mycobacterium bovis and anti-BCG antibodies was positive in each tissue.