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양식동남아산 뱀장어(Anguilla bicolor pacifica)의 Heterosporis anguillarum 감염
김진도 ( Jin-do Kim ),도정완 ( Jeong-wan Do ),최혜승 ( Hye-sung Choi ),조혜인 ( Hyae-in Jo ),이남실 ( Nam-sil Lee ),김영대 ( Young-dae Kim ) 한국환경생물학회 2014 환경생물 : 환경생물학회지 Vol.32 No.4
Shortfin eel (Anguilla bicolor pacifica) is a species of commercial importance and its production is greatly affected due to the infection by Heterosporis anguillarum. In this study, we evaluated the effect of H. anguillarum infection on the growth of Shortfin eel. A disease that trunk muscle of cultured shortfin eel, Anguilla bicolor pacifica, were irregular and resulted in death, breakout of the commercial eel culture farm. We observed that the trunk muscle of infected eels were irregular and represented white or yellowish externally. Histopathologically, a great numbers of large or small spores and sporophorocysts were also observed in degenerated muscle layer. The cloning of specific gene of H. anguillarum, encoding small subunit ribosomal RNA (SSU-rRNA)was amplified by the polymerase chain reaction(PCR) from the muscle lesion of diseased eel. The size of clone gene is well matched with the size of small subunit ribosomal RNA of H. anguillarum and thus confirming the infection by H. anguillarum.
Aeromonas veronii의 실험적 감염에 의한 양식 메기, Silurus asotus의 병리학적 변화
김진도 ( Jin Do Kim ),도정완 ( Jeong Wan Do ),최혜승 ( Hye Sung Choi ),서정수 ( Jung Soo Seo ),정승희 ( Sung Hee Jung ),조혜인 ( Hyae In Jo ),박명애 ( Myung Ae Park ),이남실 ( Nam Sil Lee ),박성우 ( Sung Woo Park ) 한국환경생물학회 2013 환경생물 : 환경생물학회지 Vol.31 No.4
Recently, a new disease showing symptoms such as epidermal exfoliation and muscular necrosis occurred in cultured Korean catfish. Although the mortality of fishes was low but the economic damages owing to loss of commercial value were severe. The authors isolated the causative agent from diseased fish and observed pathological changes both in naturally and artificially infected fish. The causative bacteria was identified as Aeromonas veronii. Subsequently we observed the daily death and pathological symptoms of artificially infected fish with Aeromonas veronii. Symptoms of artificially infected fish were similar to those of naturally infected fish and all fish died within 7 days after infection. Histopathological changes on the naturally infected fish revealed severe congestion and necrotic degeneration in the liver, spleen and kidney. Some bacterial aggregates with inflammatory degeneration were observed in the heart, and congestion and fibrosis in the lamina propria of digestive tube were predominant. In artificially infected fish, skin erosion and necrotic degeneration of muscle tissue around injected region were particularly manifested. Degeneration of hepatocytes in liver and hyalic degeneration around ellipsoids in spleen were partially observed. However, there were no predominant signs in digestive tube in artificially infected fish.