Antimicrobial Susceptibility of Actinobacillus pleuropneumoniae Isolates During 1999 and 2000 in Japan

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  • MORIOKA Ayako
    National Veterinary Assay Laboratory, Ministry of Agriculture
  • ASAI Tetsuo
    National Veterinary Assay Laboratory, Ministry of Agriculture
  • TAKAHASHI Toshio
    National Veterinary Assay Laboratory, Ministry of Agriculture

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  • 1999～2000年に国内で分離された<I>Actinobacillus pleuropneumoniae</I>の薬剤感受性
  • 1999～2000年に国内で分離されたActinobacillus pleuropneumoniaeの薬剤感受性
  • 1999 2000ネン ニ コクナイ デ ブンリ サレタ Actinobacillus pleuropneumoniae ノ ヤクザイ カンジュセイ

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Abstract

By investigating thein vitroactivity of 21 antimicrobial agents that are commonly available for veterinary use against 303 Japanese isoletes ofActinobacillus pleuropneumoniaecollected between 1986-1987 (178 strains) and 1999-2000 (125 strains), the authors compared the susceptibility of strains isolated in different years to the drugs examined. The resistant frequencies of the recent isolates were increased in (P<0.01, χ2test): PCG (change of resistance rate: 1.1%→13.6%), AMPC (1.1%→12.0%), ASPC (1.1%→12.0%), OTC (5.6%→44.8%), CP (1.1%→27.2%) and TP (1.7%→30.4%), which are used mainly for the treatment of disease caused byActinobacillus pleuropneumoniae. In addition, among recent isolates, two of 24 strains typed into serotype 1 were resistant to fluoroquinolones, and one of 76 strains of serotype 2 was resistant to macrolides. Most of the recent isolates were highly susceptible to CTF, FF and fluoroquinolones.

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