Studies on Diseases caused by Isopods in relation to Bacterial Infection Among Some Wild Marine Fishes at Suez Canal Area

A total number 200 different marine fish species represented as 100 Elsarah  (Nemipterus  japonicus ) and 100 Mias (Pomatomus  saltatrix L.)  were collected seasonally from Suez and Ismailia provinces respectively . The infested marine fishes revealed no pathognomonic signs.They were investigated for detection of Isopoda parasites. It was revealed that 50% of the examined marine fishes was infested.The detected species were Irona nanodies from Nemipterus japonicus with a prevalence 60% , and Lironeca ovalis from Pomatomus saltatrix L with a prevalence 40%.The histopathological alterations were recorded and discussed.The secondary bacterial invasion was manifested by the isolation of Pseudomonas aeruginosa where it was experimentally infected into Tilapia zillii and reisolated again.