Investigations of Serratia liquefaciens Infection in Rainbow Trout (Oncorhynchus mykiss Walbaum)

Authors : Seyit AYDIN

Pages : 643-650

View : 12 | Download : 5

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :This study was conducted to investigate Serratia liquefaciens infection in juvenile cultured rainbow trout insert ignore into journalissuearticles values(Oncorhynchus mykiss Walbaum); during June and July in 1996 about 20 days after flooding in three farms in Erzurum. Bacterial isolates were identified from each farm and tested to determine sensitivity against 18 chemotherapeutants. In addition to minimum bactericidal concentrations insert ignore into journalissuearticles values(MBC); of chloramine-T and potassium permanganate insert ignore into journalissuearticles values(KmnO4); were exposures of 17.07-20 mg/l for 1 h and 23.27 mg/l for 10 min. Infections caused fallen scales, bloody and swollen kidney, hyperaemic and pale regions in the liver, haemorrhagic spots in the gills and bloody exudate in the intestine. Histopathological examination demonstrated pathological changes in the liver, spleen and kidney. Naturally infected fish were examined for chemical parameters of blood and compared with healthy fish. Amylase and glutamate oxalacetate transaminase insert ignore into journalissuearticles values(GOT); enzymes, triglyceride insert ignore into journalissuearticles values(TG);, cholesterol insert ignore into journalissuearticles values(CHOL);, albumin insert ignore into journalissuearticles values(ALB);, albumin/globulin insert ignore into journalissuearticles values(A/G);, iron insert ignore into journalissuearticles values(Fe); levels, total iron binding capacity insert ignore into journalissuearticles values(TIBC);, unsaturated iron binding capacity insert ignore into journalissuearticles values(UIBC); and saturation insert ignore into journalissuearticles values(ST); in the blood serum of infected fish were significantly increased. Glutamate pyruvate transaminase insert ignore into journalissuearticles values(GPT); and L-lactate dehydrogenase insert ignore into journalissuearticles values(LDH); enzymes, bilirubin insert ignore into journalissuearticles values(BIL);, glucose insert ignore into journalissuearticles values(GLC);, creatinine insert ignore into journalissuearticles values(CRE); and total protein insert ignore into journalissuearticles values(TP); values were not significantly different between the naturally infected fish and the healthy fish. In the therapeutic applications, oral applications of potentiated sulphonamide after disinfections with chloramine-T controlled the infections.
Keywords : Rainbow trout, disease, Serratia liquefaciens, blood, histopathology