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가물치에 대한 Nocardia seriolae의 인위감염과 조직학적 관찰
이남실(Nam-Sil LEE),한현자(Hyun-Ja HAN),김명석(Myoung-Sug KIM),도정완(Jeong-Wan DO),정승희(Sung-Hee JUNG),조혜인(Hyae-In CHO),김진도(Jin-Do KIM) 한국수산해양교육학회 2016 水産海洋敎育硏究 Vol.28 No.3
Snakehead, Channa argus were intraperitoneally infected with Nocardia seriolae. at the concentrations of 1.5×10<SUP>7</SUP> cfu/㎖ or 1.5×10<SUP>8</SUP> cfu/㎖. The infected fish were kept in aquaria at 25℃ and 30℃ for 3 weeks. Clinical signs and mortality were monitored daily to evaluate the virulence. All artificially infected fish showed the same clinical sign found in naturally infected fish. All the fish infected with 1.5×10<SUP>8</SUP> cfu/㎖ of N. seriolae died within 24days. N. seriolae showed higher virulence to snakehead at the temperature 30℃. Internal lesions such as whitish nodules in the infected internal organs were not correlated with mortality but some degenerative changes were observed in all the infected organs within a week. Whitish nodules in the infected organs which are the typical character in nocardial infection was initially found at two weeks after the artificial infection in snakehead.