Infectious Myonecrosis Virus

Also known as: IMNV

Infectious Myonecrosis Virus (IMNV) is a contagious virus that primarily affects farmed Pacific white shrimp (Penaeus vannamei). It causes necrosis of muscle tissue, especially in the tail, which can result in a milky or whitish appearance of the affected areas. Infected shrimp often show slow growth, reduced feeding, and lethargy. The disease can cause high mortality, particularly under stress or poor environmental conditions. IMNV is an RNA virus classified within the family Totiviridae. It is transmitted horizontally via water, cannibalism, or contact with infected individuals.

Distribution: Reported primarily in Brazil and Indonesia, with potential spread to other shrimp-farming regions.
Detection Methods: Molecular diagnostics such as RT-PCR; histopathological examination.
Hosts: Pacific white shrimp (Penaeus vannamei) and other penaeid shrimp species.
Target Tissue: Skeletal muscle.