Abstract
Incidences of white feces syndrome (WFS) was reported in farm reared Litopenaeus vannamei during 2014-2015 in many shrimp farms of West Godavari, Prakasam and Nellore districts of Andhra Pradesh. The disease was observed after 50-60 days of stocking the PLs. A total of five species of bacteria namely Vibrio parahaeolyticus, V. fluvialis, V.mimicus, V. alginolyticus and Vibrio sp. were isolated from the feces of WFS infected shrimps. The affected shrimp begins to eat less and tend to be darker in colour. And early indications appear in feed trays and water surface, where abundant floating white fecal strings were observed. In severely affected shrimp hepatopancreas and gut become white and pale yellow in colour.
