The Israeli Journal of Aquaculture Bamidgeh 57(4), 2005, 215-222
 
MYCOBACTERIOSIS IN EUROPEAN SEA BASS, DICENTRARCHUS LABRAX L., CULTURED IN TURKEY

Jale Korun1, Vakur Olgac2, Kadriye Akgun-Dar3, Angelo Colorni4 and Ariel Diamant4*

1Department of Fish Diseases, Faculty of Fisheries, Akdeniz University, Kampus, 07049, Antalya, Turkey
2Department of Pathology, Institute of Oncology, Istanbul University, Capa, 34390, Istanbul, Turkey
3Department of Biology, Faculty of Science, Istanbul University, Vezneciler, 34459, Istanbul, Turkey
4Israel Oceanographic and Limnological Research, National Center for Mariculture, PO Box 1212, Eilat, 88112, Israel
 
(Received 1.8.05, Accepted 1.9.05)

Key words: Aegean Sea, Dicentrarchus labrax, European sea bass, granuloma, histological study, mycobacteriosis
 
 
Abstract



A case of mycobacteriosis in European sea bass (Dicentrarchus labrax L.) cultured in Turkey is described. Diseased fish were characterized by lethargy, lingering passively at the water surface, pale gills, and exophthalmia. Internally, grayish-white nodules were observed in the liver, spleen, and kidney. In one individual, a granulomatous mass of renal origin protruded into the abdominal cavity. The principal histological feature was the occurrence of characteristic granulomas with associated acid-fast, rod-shaped bacteria. This is the first confirmed case of fish mycobacteriosis in Turkey.


* Corresponding author. Fax: +972-8-6375761, e-mail: diamant@agri.huji.ac.il

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