양식 미꾸라지(Misgurnus mizolepis)에서 분리한 Staphylococcus epidermidis = Staphylococcus epidermidis isolated from Cultured Mud Loach(Misgurnus mizolepis)

다국어 초록 (Multilingual Abstract)

A staphylococcal infection was occurred in mud loach (Misgurnus mizolepis) cultured in recirculatiog aquaria at Chonbuk Prefecture. The diseased fish exhibited a lethargic, erratic and spiraling swimming pattern on the water surface. Their typical symptoms were exphothalmus, petechial hemorrhage on the operculum, and protrusive lesions on the head and ulcerative lesions on the body surface at the posterior part of the pectoral fin. A feasible causative organism isolated from the diseased fish was identified as Staphylococcus epidermidis on the basis of its biological and biochemical characteristics. It grew at 0~4% NaCI(optimum 0.5% NaCI) and at pH 5~8(optimum 7). The organism perished within a day in sea water or 10-fold diluted seawater with distilled water, and within 6 days in distilled water containing 0.01% yeast extract. But it survived over 6 days in distilled water or tap water. The isolate showed negative pathogenicity to mud loach(M. mizolepis)and (Misgurnus angillicaudatus)at 28℃.