Histopathological analysis of Pangasius sp. infected by Edwardsiella tarda causes Edwardsiellosis disease

Pangasius sp are included in the group of catfish that have high economic value. Catfish are susceptible to infection with Edwardsiellosis caused by Edwardsiella sp. Edwardsiellosis is one of disease which causes declining of catfish production in Indonesia. Histopathological test can be one way to diagnose a disease infection by observing cell or tissue changes. The method used in this study is descriptive and sampling method by exsitu, by taking samples from the field and observing in the laboratory. The results showed tissue changes in the organs of Pangasius sp. due to bacterial infection which leads to damage hyperplasia, lamella fusion, and necrosis.