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100%

Bednarska M. , Bednarski M. , Polechonski R.

nr 07

783-785

Streptococcal infections in fish cause high economic losses in the fish farming industry. The species responsible for the streptococcal infection are Lactococcus garvieae, Lactococcus piscium, Streptococcus iniae, Streptococcus agalactiae, Streptococcus parauberis, Streptococcus dysgalactie, Vagococcus salmoninarum and Carnobacterium piscicola. The main pathogenic species are L. garvieae and S. iniae. In some countries, also in European ones, in the summer season these two species cause more than 50% mortality in the rainbow trout industry. Lactococcosis is rapidly spreading throughout the southern part of Europe. Vaccination can be an effective procedure in the control of lactococcosis. The immunity after injection indicates a good level of protection but of short duration. Some of the species of Streptococcus pathogenic for fish are zoonotic agents. Of primary importance is Streptococcus iniae which can cause bacteremic cellulitis and osteomyelitis in humans.

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

80%

Kav K. , Erganis O.

2008

tom 52

nr 2

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.