Yavru Kültür Gökkuşağı Alabalıklarında (Oncorhynchus mykis Walbaum, 1792) Görülen Yeni Bir Pseudomonas Türü: Pseudomonas plecoglossicida

Abstract

In this study, inoculations were streaked onto TSA medium from moribund young (~2 g) rainbow trouts (Oncorhynchus mykiss Walbaum,
1792) provided from a commercial fish farm for bacteriological investigation to determine the etiological agent of the disease problem. Caudal
and dorsal fin rot, darkening of the skin around the lateral area and the head, hemorrhages and fattening on the liver and a yellowish fluid in the
intestines were observed in the fish samples. The etiological agent of the disease was identified using routine laboratory methods and also API 20E
and API 20NE test kits. Proper antibiotics which can be used in the control of the disease were determined with antimicrobial susceptibility tests. In
this study Gram-negative, oxidative, motile, cytochrome-oxidase and catalase positive, brown pigmented isolates which are resistant to O/129 were
detected. With the other test results, the etiological agent was identified as Pseudomonas plecoglossicida. Ciprofloxacin, kanamycin and flumequine
were detected to be the most effective antibiotics among others used in this study. Different species of the genus Pseudomonas were isolated as
etiological agent in rainbow trouts before, however P. plecoglossicida has been identified for the first time.