시판 19종 한약재 methanol 추출물의 어병세균 Edwardsiella tarda에 대한 항균활성을 측정한 결과, 오배자 추출물에서 가장 강한 활성이 나타났다. 오배자 methanol 추출물은 용매 극성에 따라 분획하였으며, 각 분획물의 항균활성 측정 결과 ethyl acetate 층에서 가장 강한 항균 활성이 나타났다. 이는 E. coli와E. tarda 모두에 대해 유사한 결과를 보였다. 오배자 추출물의 최소생육저해농도(MIC)를 측정한
The methanol extracts of 19 commercial herb medicines was analyzed to antibacterial activities against Edwardsiella tarda, causing several fish diseases. Rhus javanica showed most strong antibacterial activity against E. tarda and Escherichia coli. Methanol extract of R. javanica was further extracted using several organic solvents having different polarity. Extract from ethyl acetate fraction showed strong activity against E. tarda as well as E. coli. Minimal inhibitory concentration, MIC of R. javanica extract was measured and resulted showing for E. tarda and for E. coli. It is needed that, from these results, further purification and isolation of reposible compound of these activities and further study on the synergy effect using combination with antibiotics against pathogenic bacteria.