Edwardsiellosis affected cultured O. niloticus showed haemorrhages allover the body especially at base of pectoral fins, operculum and belly, hemorrhagic mouth, protruded and congested vent, fin rot and exophthalmia. The isolated strains were identified biochemically as citrate negative and citrate positive E. tarda and the identification was confirmed by API20E system and PCR. The citrate negative isolate was highly pathogenic ... Read more

Edwardsiellosis (Emphysematous putrefactive disease) is one of the most serious bacterial diseases affecting Clarias gariepinus (C. gariepinus) fish. This study reported the most characteristic lesions including skin depigmented areas, external hemorrhages, small cutaneous ulcers, gas filled pockets give rise offensive odour and ascitis. The disease prevalence was 5.2% in the examined fish sample and 16.7% in the clinically diseased fish. ... Read more