VPP 322: Aquatic Animal Diseases, Health Care and Management (1+1)

Histopathological changes caused due to bacterial pathogens in shrimp

HISTOPATHOLOGICAL CHANGES DUE TO BACTERIAL PATHOGENS IN SHRIMP 

Bacterial disease	Histopathological changes
Vibriosis	Multifocal melanized and/or non-melanized hemocytic nodules with spectic centres. Nodules present throughout the shrimp body in the hemocoel spaces and in the loose connective tissues.
NHP (Necrotizing Hepatopancreatitis)	Hepatopancreatic atophy, granulomatous lesions and the presence of massive numbers of very small, intracellular, gram negative bacteria in HP tubule epithelial cells.
Rickettsial infections	Showing ricketsial–like bacteria in the cytoplasm of infected cells.
Mycobacteriosis	Lesions consist of multifocal, usually heavily melanized, hemocytic nodules or larger granulomatous lesions. Palely basophilic rod shaped bacteria may be evident in, or associated with, the hemolytic nodules.

Click here to view normal histology