STUDIES ON DRUG RESISTANT PLASMIDS DERIVED FROM CULTURED FISH
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概要
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Twenty percent of cultured carp and their pond water in Gunma and Saitama Prefecture were contaminated with <I>Salmonella</I>. The major isolates were <I>S. typhimurium</I> (30%), 82% of which were drug-resistant. Six kinds of R plasmids, five IncH and one IncK, were isolated from five multiply resistant <I>S. typhimurium</I>. No <I>Salmonella</I> could be isolated when the carp was washed thoroughly with clean fresh water.<BR>Each of five kinds of fresh water fish, -carp, ayu, eel, rainbow trout, and yamame-, carried drug-resistant bacteria, the majorioy of which were <I>Aeromonas hydrophila</I>, ranging from 70% (Carp) to 29% (Eel) in the isolates. All of these <I>A. hydrophila</I> were drug-resistant, and 44 R plasmids were isolated. They all belonged to the IncC group. As for 17 standard R plasmids belonging to different incompatibilities, seven kinds of R plasmids (IncFII, FV, C, O, P, T, X) were transferable to <I>A. hydrophila</I>, but only IncC R plasmid was stable in the new host. The results paralleled the epidemiologdcal studies. The IncC plasmid was also characteristic in its high transferability at relatively high salt concentration.
- 北関東医学会の論文
北関東医学会 | 論文
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