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Isolation and characterization of Pseudomonas putida caused granulomas in cultured sea bass (Dicentrarchus labrax) in Turkey

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C URKU
C URKU

Abstract


The present study describes a Pseudomas infection in diseased European sea bass (Dicentrarchus labrax) caused by Pseudomonas putida in Turkey. Detected symptoms in the diseased fish were internally white nodules in the liver and kidney. Bacteriological samples from the kidney, spleen, liver and blood were streaked onto Tryptic Soy Agar (TSA) and Brain Heart Infusion Agar (BHIA) containing 1.5 % NaCl. After incubation, bacterial colonies produced florescent pigment under the ultraviolet light were observed. The morphological and physiological characteristics of bacterial colonies were determined together with their biochemical characteristics by using API 20E and API 20NE, and isolated bacteria were identified as Pseudomonas putida. Furthermore, 16S rRNA gene of one isolate was partially sequenced and showed 99 % identity with the Genbank sequences of P. putida. Histopathologically, the granulomatous lesions and presence of Gram-negative basil shaped bacteria in these lesions were observed in the liver and kidney. This study represents the first report of P. putida isolation and identification as a primer agent and granulomas in the kidney and liver in the diseased sea bass in the Black Sea, Turkey.


Keywords


API 20E; API 20NE; cultured sea bass; granulomas; Pseudomonas putida; 16S rRNA gene

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References


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