Bacterial Disease Screening of Cultured Horse Mackerel (Trachurus Mediterraneus) İn Sea- Cages in Southern Black Sea Region of Turkey

Abstract

This study aimed to screen bacterial disease in cultured horse mackerel in the marine fish farm of the Southern Black Sea Region of Turkey. Fish bacteria were surveyed monthly and collected in November 2011 to October 2013 from cultured horse mackerel in the sea-cages. During the study, no parasite was found while several Gram negative bacterial species including Aeromonas hydrophila, Chryseobacterium indologenes, Vibrio vulnificus, Bulkholderia cepacia, Photobacterium damselae damselae and Vibrio alginolyticus were isolated from cultured fish. Fifty percent or more of the bacteria were resistant to streptomycin, sulfamethoxazole, gentamycin, cephalothin, and ampicillin. The most effective antibiotics were florefenicol and chloramphenicol. The most prevalent resistance genes were found to be beta-lactam (blaTEM-OT3-4) and Tetracycline (tetB).

Cilj ovog rada je da prikaže bakterijske bolesti šnjura gajenog u morskom ribnjaku u Južnoj crnomorskoj regiji Turske. Bakterijska flora riba ispitivana je jednom mesečno a uzorci su prikupljani od šnjura gajenog u morskim kavezima od novembra 2011 do oktobra 2013. U toku istraživanja nije utvrđeno prisustvo parazita, dok je iz uzoraka iz gajenih riba izolovano nekoliko vrsta Gram-negativnih vrsta bakterija, uključujući Aeromonas hydrophila, Chryseobacterium indologenes, Vibrio vulnificus, Bulkholderia cepacia, Photobacterium damselae damselae i Vibrio alginolyticus. Pedeset procenata ili više bakterija bile su otporne na streptomicin, sulfametoksazol, gentamicin, cefalotin i ampicilin. Kao najefikasniji antibiotici pokazali su se florfenikol i hloramfenikol. Najčešće utvrđeni geni rezistencije bili su beta-laktamski (blaTEM-OT3-4) i tetraciklinski (tetB).