Contribution to motile aeromonas septicemia in some cultured and wild freshwater fishes

ABSTRACT

This study was carried out to gain more information about the prevalence of motile aeromonas septicemia [MAS] in both cultured and wild Nile tilapia and karmout catfish. The clinical signs and PM lesions were pronounced in cultured fish. Aeromonas hydrophila was recovered from all MAS affected fish. The incidence of MAS in cultured and wild Nile tilapia was 10% and 2.5%, respectively, while it was 18.75% and 6.25% in cultured and wild karmout catfish, respectively. Reisolation of A. hydrophila was recovered after experimental infection of karmout catfish by i.p. and s.s. revealing the same clinical signs and lesions. The histopathological pictures produced by such microorganisms along the course of experimental infection were discussed. Besides, A. hydrophila isolated from cultured fish were more resistant to antibiotic sensitivity test than those isolated from wild fish