Naim SAĞLAM, Ünal İSPİR, Mustafa DÖRÜCÜ, Engin ŞEKER

Doğu Anadolu Bölgesinde bazı gökkuşağı alabalığı (Oncorhynchus mykiss) işletmelerinde görülen Flavobacterium psychrophilum enfeksiyonunun araştırılması

Doğu Anadolu Bölgesinde Elazığ, Malatya ve Erzincan illerinde bulunan beş farklı alabalık işletmesinde 2000 - 2002 yılları arasında 0.2 - 0.8 g ağırlığındaki gökkuşağı alabalığı (Oncorhynchus mykiss, W., 1792) yavrularında öldürücü bir enfeksiyona rastlandı. Hastalıklı balıklarda kısmen ekzoftalmus ve deride kararmaların olduğu, balıkların durgun, iştahsız ve yem almadıkları gözlendi. Bağırsakların boş ve yer yer hemorajik odakların oluştuğu görüldü. İç organlardan Anacker - Ordal Ağar (AOA)'a ekimler yapılarak etkenin Flavobacterium psychrophilum olduğu belirlendi. Disk - diffüzyon yöntemi ile antibiyogram testi uygulanarak suşların oksitetrasiklin, nitrofuran, amoksilin + klavunolik asit ve eritromisin antibiyotiklerine karşı duyarlı; kloramfenikol ve penisilin'e ise dirençli olduğu tespit edildi.

A study of Flavobacterium psychrophilum infection in some cultured rainbow trout (Oncorhynchus mykiss) in Eastern Anatolia

An outbreak has appeared affecting rainbow trout weighting 0.2 - 0.8 g from five different fish management units, in East Anatolia Region between years 2000 - 2002. Infected fish had exophthalmus, and dark skin. They were calm, feed unwillingly and sometimes eat noting. Intestine of fish was empty and hemorrhagic. Flavobacterium psychrophilum was detected from incubation of samples from internal organs of fish on Anacker Ordal Agar (AOA). Antibiogram test by disc diffusion methods showed that strains have resistance to chloraphenycol and penicillin but sensitive to antibiotics; oxytetracyline, nitrofuran, amoxicillin + clavunolic acid and erytromycine.

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