The present study was carried out to isolate various members of Enterobacteriaceae from retailed and farm fish as Tilapia nilotica and Mugil cephalus and identifying them by biochemical tests. The results obtained in the present study showed that 47 Enterobacteriaceae strains were isolated from 50 Tilapia niloticus fish samples with a percentage of 94% (25 from retailed fish and 22 from farm fish). On the other side 46 isolates of Enterobacteriaceae strains were isolated from 50 Mugil cephalus with a percentage of 92% (22 from retailed fish and 24 from farm fish). The most dominants isolates were Citrobacter spp., Enteriobacter spp., Klebsiella spp., Proteus spp., and Serratia spp. This together with the highly pathogenic Enterobacteriaceae including Salmonella spp. and E. coli.
Key words: Enterobacteriaceae, Tilapia niloticus, Mugil cephalus.
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