Edwardsiella tarda because the organism is invasive and produces a potent hemolysin. We
therefore relied on polymerase chain reaction (PCR) to determine the occurrence of genes
for enterotoxins (LT-I, EAST-1), Shiga toxin (Stx-1, Stx-2), cytotoxic necrotizing factors (CNF-
1, CNF-2), aerobactin, invasion plasmid of enteroinvasive Escherichia coli, EPEC
adherence factor (EAF), intimin (Eae), enterohemolysin (EntHly) and hemolysin (Hly) in 53 …