Isolation and identification vibrio parahaemolyticus which causing black skin lesion from golden fish

الملخص EN

The aim of this research was aimed to isolate and diagnose the Vibrio.

Parahaemolyticus that cause black skin lesion from golden fish and study the histopathological changes in the skin and fins.

Seventy-two samples of gold fish were taken from Ornamental Fish markets in Al- Najaf city, The bacteria was diagnosed through culture on normal and special media then conducted by biochemical tests as well as the examination was conducted by API20.

The samples of fins and skin were examined for histopathological examination, Histopathologically indecated the presence of degeneration and necrosis of the muscles fibers as well odema were seen in interstitial tissue, , congestion and hemorrhage were recorded in the same area with the presence of infiltration of inflammatory cells among the skeletal muscle.

This study concluded that V.

parahaemolyticus are responsible for the severe histopathological changes in all organs of infected fishes