Antibiotic susceptibility of Lactococcus garvieae in rainbow trout [Oncorhyncus mykiss] farms

The aim of the study was to describe bilateral exophthalmos "pop eye syndrome" in rainbow trout (Onchorynchus mykiss) fisheries in the Konya region and to determine effective antibiotic treatments. Between June 2002 and August 2004, 180 ill fish were obtained from 6 rainbow trout fisheries where the disease had been observed. Lactococcus garvieae strains were isolated from fish tissues during different periods. All the isolates were found susceptible to penicillin-G, ampicillin, amoxycillin, ampicillin+sulbactam, amoxicillin/clavulanic acid, vancomycin, ciprofloxacin, marbofloxacin, chloramphenicol, florfenicol, erythromycin, oxytetracycline, cefoperazone, sulbactam/cefoperazone, and novobiocin. It seems that β- lactam antibiotics are preferred in the treatment of L. garvieae infection in the rainbow trout farms.