علايم ظاهري و آسيب شناسي بافتي بيماري لكه سفيد در ميگوي پرورشي سفيد هندي در استان خوزستان

Clinical Signs and Histopathology of White Spot Syndrome Disease (WSSD) in Cultured Penaeus indicus in Khouzestan Province

Since 1992, white spot syndrom disease reported from China, has overshadow all other viral diseases. The WSSD was also reported from all countries in Asia and America. ln July 2002, the high mortality in cultured shrimps of Penaeus indices occurred in Khouzestan province, south of lran. The clinical signs of affected shrimps were characterized by distinct white spots in the carapace with size of 0.5-2 mm. Moribund shrimp usually showed reddish coloration of the body, lethargic and reduced feed intake or stopped feeding, the stomach was empty and shrimp stayed at the side of pond edge. The high mortality rates occurred within a week alter the emergence of gross signs. The moribund shrimp collected and fixed in Davidson fixative, then processed routinely. The section from all tissues except hepatopancreas showed intranunclear Cowdry type-A inclusion body. According to the clinical signs, histopathological fingings and high mortality, the disease occurred in Abadan area (Khouzestan province) identified as white spot syndrome disease (WSSD).