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수온과 세균 감염이 나일 틸라피아(Oreochromis niloticus)의 oxolinic acid 흡수와 배설에 미치는 영향
김명석,박성우,허민도,정현도,KIM Myoung Sug,PARK Sung-Woo,HUH Min-Do,JEONG Hyun Do 한국수산과학회 1998 한국수산과학회지 Vol.31 No.5
Oxolinic acid (OA)를 경구 (80 mg/kg body weight)와 약욕 (20mg/$\ell$)의 방법으로 각기 다른 생리적 상태에 있는 나일 틸라피아 (Oreochromis niloticus)에 투여한 후 어류의 각 장기 내에 분포하는 OA의 농도를 bioassay 법으로 분석함으로써 어류의 생리적 상태가 OA 흡수, 분포 및 배설에 미치는 영향을 조사하였다. 사육수의 온도를 $15^{\circ}C$ 와 $25^{\circ}C$로 한 실험구에 OA를 경구로 투여한 후 약물의 흡수와 배설을 비교해 보면, $15^{\circ}C$ 실험구에서의 약물 흡수와 배설속도는 $25^{\circ}C$ 실험구보다 느렸지만 각장기 내 최고농도는 $25^{\circ}C$ 실험구와 유의성 있는 차이를 보이지 않았다. 그러나 OA를 약욕법으로 투여하는 경우 흡수 및 배설속도 모두 온도차에 의한 명확한 차이를 보여 주었다. 약물투여의 실질적인 목표가 되는 병어에서의 약물분포를 분석하기 위하여 E. tarda에 인위감염된 어류에 OA를 경구와 약욕의 방법으로 투여하였을 때 각조직 내의 약물 분포 및 농도의 변화는 건강어에 대비하여 구별됨을 확인하였다. The distribution and elimination of oxolinic acid (OA) following oral (80mg/kg body weight) and bath (20 mg/$\ell$) treatment were examined in the organs and plasma of Nile tilapia (Oreochromis niloticus) on different temperatures and physiological conditions using a bioassay method. On the analysis of temperature effect, both absorption and elimination of OA after oral administration were delayed in the group at $15^{\circ}C$. but significant difference of the peak concentrations in the tissues of the groups at $15^{\circ}C$ and $25^{\circ}C$ was not revealed. However, the changes of maximam concentration, absorption and elimination rates in the tissues of fish following bath treatment depending on different temperatures were more significantly different from the results of the studies with oral administration. The pharmacokinetics of OA in the tissues of diseased fish, the main target of drug treatment, also appeared to be distinguishable from those of healthy fish.
Edwardsiellosis 의 진단을 위한 정성적 ELISA 법
김명석(Myoung Sug Kim),황은아(Eun A Hwang),정현도(Hyun Do Jeong),허민도(Min Do Huh) 한국어병학회 1999 한국어병학회지 Vol.12 No.1
Optimization and standardization of solid phase enzyme immunoassay were done for the diagnosis of edwardsiellosis in fish. The analyzed degree of immobilized antibody on surface of solid phase with peroxidase saturation method showed the optimized result by using partially purified 50 ㎍/㎖ of rabbit anti-E. tarda Edk-2 antibody in sodium bicarbonate buffer for overnight incubation to cover the surface of polystyrene beads. Optimized immunoreaction was observed in the treatment of 50 ㎍/㎖ of biotin conjugated antibody followed extravidin-peroxidase diluted 1 : 2,000 in PBS. The detectable concentrations of the this method were 1 × 10^5 cells/㎖ and 5 × 10^5 cells/㎖ expressed as the source of antigen amount for EDTA extraction and heat extraction, respectively. High cross-reaction of solid phase ELISA with the prepared rabbit and-E. tarda Edk-2 was observed against E. tarda strains isolated from flounder suffering from edwardsiellosis in aquatic farms of Korea. It suggested that the potential of this solid phase of ELISA technique is very powerful for the application to different strains of E. tarda isolated in farms of many different areas.
뱀머리돌고래, Steno bredanensis에서 분리된 Enterococcus faecium의 특성
김명석 ( Myoung Sug Kim ),최혜승 ( Hye Sung Choi ),한현자 ( Hyun Ja Han ),김두남 ( Doo Nam Kim ),안두해 ( Du Hae An ),정승희 ( Sung Hee Jung ) 한국어병학회 2013 한국어병학회지 Vol.26 No.3
Enterococcus faecium was isolated from the internal organs of the rough-toothed dolphine, Steno bredanensis which was stranded at Jeju island. E. faecium were isolated from the liver, spleen, kidney, heart and lung up to 1.54 × 106 cfu/g. No significant differences of bacterial enzyme activities between E. faecium KCCM 12118 and the isolates were found. Biochemical constellation was the same or similar to that of E. faecium KCCM 12118 according to API20 strep. All isolates had the multi-drug resistance to 6 antibiotics by an agar disk diffusion method but these isolates didn`t have resistance to chloramphenicol and vancomycin.
양식 넙치, Paralichthys olivaceus에서 분리된 Edwardsiella tarda, Vibrio spp., Streptococcus spp.의 항균제 내성 경향
김명석 ( Myoung Sug Kim ),서정수 ( Jung Soo Seo ),박명애 ( Myoung Ae Park ),조지영 ( Ji Young Cho ),황지연 ( Jee Youn Hwang ),권문경 ( Mun Gyeong Kwon ),정승희 ( Sung Hee Jung ) 한국어병학회 2010 한국어병학회지 Vol.23 No.1
In this study, we carried out research on the level of single and multi-drug resistance of bacteria isolated from cultured flounder Paralichthys olivaceus. One hundred sixty one bacteria were isolated from cultured olive flounder Paralichthys olivaceus in Korea and the isolates consisted of Edwardsiella tarda (n=32), Vibrio ichthyoenteri (n=37), Vibrio spp. (n=54), Streptococcus parauberis (n=28) and Streptococcus spp. (n=10). These E. tarda isolates were highly resistant in the order of tetracycline (84.4%) and oxolinic acid (71.9%). V. ichthyoenteri and Vibrio spp. showed resistance ampicillin (94.6% and 81.5%) and tetracycline (56.8% and 42.6%). S. parauberis isolates were resistant ampicillin (57.1%), tetracycline (57.1%) and erythromycin (35.7%). Of the isolates, 84.4% of E. tarda, 73.0% of V. ichthyoenteri, 57.4% of Vibrio spp., 42.8% of S. parauberis and 70.0% of Streptococcus spp. isolates exhibited multi-drug resistance against more than two antibiotics.
양식 넙치 (Paralichthys olivaceus) 에서 분리된 Edwardsiella tarda에 대한 항균제 MIC 값 분포
김명석 ( Myoung Sug Kim ),조지영 ( Ji Young Cho ),서정수 ( Jung Soo Seo ),정승희 ( Sung Hee Jung ),최혜승 ( Hye Sung Choi ),박명애 ( Myoung Ae Park ) 한국어병학회 2012 한국어병학회지 Vol.25 No.3
The minimum inhibitory concentration (MIC) of eight antibiotics against Edwardsiella tarda 49 strains isolated from olive flounder (Paralichthys olivaceus) was determined by the broth microdilution method. E. tarda showed 38.8% and 61.2% resistance to ampicillin and amoxicillin. Both resistance rates of E. tarda were 4.1% against ciprofloxacin and norfloxacin. The MIC50 values of oxytetracycline, amoxicillin and oxolinic acid were 64 ㎍/㎖, 32 ㎍/㎖and 4 ㎍/㎖. The MIC50 value to ciprofloxacin was 0.25 ㎍/㎖which was lowest among eight antibiotics tested.
김명석(Myoung Sug KIM),최혜승(Hye Sung CHOI),김나영(Na Young KIM),정승희(Sung Hee JUNG) 한국수산해양교육학회 2016 水産海洋敎育硏究 Vol.28 No.6
The purpose of this research was to investigate the bacterial flora of healthy olive flounder larvae (Paralichthys olivaceus) and live feeds (Rotifer spp. and Artemia spp.). The total bacteria counts were 9.2×10<SUP>7</SUP> and 1.2×10<SUP>10</SUP> cfu/g and Vibrio sp.(82.8%) was dominant in rotifers. The total bacteria counts were 3.8×10<SUP>6 </SUP>and 9.2×10<SUP>6</SUP> cfu/g and Vibrio sp.(73.3%) was dominant in artemia. In olive flounder larvae, the total bacteria counts were 1.4×10<SUP>6</SUP> ~ 8.3×10<SUP>7</SUP> cfu/g and V. harveyi (38.5%) was dominant. It might be potential marker of disease outbreak in olive flounder larvae.