血液培養由来β溶血性レンサ球菌検出率と感受性の年次推移  [in Japanese] Time course of changes in the detection rate and antibiotic sensitivity of blood-culture-derived β-hemolytic streptococci  [in Japanese]

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Abstract

2007・2009・2011年度の3ヶ年に5施設の血液培養から検出されたβ溶血性レンサ球菌216株を対象に,<i>Streptococcus pyogenes</i>(Group A Streptococcus:GAS),<i>Streptococcus agalactiae</i>(Group B Streptococcus:GBS)およびGAS・GBS以外のβ溶血性レンサ球菌(non-AB)の3つの菌グループに区分し,検出率と抗菌薬感受性の推移を調査した.検出率に大きな変動は無かったが,<i>S. equisimilis</i>と推定される菌グループの割合が上昇していた.抗菌薬感受性はいずれの菌グループもペニシリン系抗菌薬に感受性であった.エリスロマイシン(EM)耐性は,GASでは2011年度に7株中2株(28.6%)が耐性であり,少ない株数の中にも耐性株が認められた.GBSのEM耐性率に大きな変動は無かったが,non-ABでは耐性率が上昇傾向であった.レボフロキサシン(LVFX)耐性はGBSで年々上昇しており,2011年度には61.1%であった.また,non-ABでも2011年度に1株耐性株が認められ,今後の抗菌薬耐性化に注視が必要である.

Two hundred and sixteen strains of β-hemolytic <i>Streptococcus</i> were detected at five institutions in fiscal years 2007, 2009, and 2011. These strains were divided into three bacterial groups: <i>Streptococcus pyogenes</i> (Group A Streptococcus, GAS), <i>Streptococcus agalactiae</i> (Group B Streptococcus : GBS), and β-hemolytic <i>Streptococcus</i> strains other than GAS or GBS (non-AB). Changes in detection rate and antibiotic sensitivity of these strains were surveyed. No marked change was noted in detection rate, but that of the bacterial group assumed to include <i>Streptococcus equisimilis</i> increased. Regarding antibiotic sensitivity, all bacterial groups were sensitive to penicillin antibiotics. Regarding erythromycin (EM) sensitivity, two of seven GAS strains (28.6%) isolated in 2011 were resistant, showing that resistant strains were present although the number of isolates was small. The EM resistance rate did not markedly change in GBS, but tended to increase in non-AB. Levofloxacin (LVFX) resistance increased yearly in GBS and reached 61.1% in 2011. Resistance was also noted in one non-AB strain in 2011. It is necessary to pay attention to the acquisition of antibiotic resistance in the future.

Journal

  • Japanese Journal of Medical Technology

    Japanese Journal of Medical Technology 63(2), 236-240, 2014

    Japanese Association of Medical Technologists

Codes

  • NII Article ID (NAID)
    130005057057
  • Text Lang
    JPN
  • ISSN
    0915-8669
  • Data Source
    J-STAGE 
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