Piscine mycobacteriosis in gold fish (Carassius auratus) and Koi carp (Cyprinus carpio): two case reports

Piscine mycobacteriosis is a systemic, chronic, progressive disease in fish caused by the non-tuberculous mycobacteria (NTM). It has significant economic and public health impacts on commercial culture of ornamental fish. Clinical manifestation and the pathology of the infection in ornamental fish may vary depending on the species of fish affected and the species of the pathogenic NTM involved. This clinical communication describes mycobacteriosis in two different ornamental species; gold fish (Carassius auratus) and koi carp (Cyprinus carpio).