Mycobacterium abscessus複合肺疾患における培養物の変換とマクロリド耐性
Suting Chen1, Shengjuan Bao1,2, Jifang Zheng1
1Beijing Key Laboratory for Drug-Resistant Tuberculosis Research, National Clinical Laboratory on Tuberculosis, Beijing Chest Hospital, affiliated Capital Medical University, Beijing Tuberculosis and Thoracic Tumor Institute, Beijing, China.
Microbiology spectrum
|September 2, 2025
まとめ
クラリトマイシン (CLA) はアジトマイシン (AZI) よりも Mycobacterium abscessus複合性肺疾患 (MABC- PD) の治療に有効です. CLAは,AZIと比較して,in vitroではより高い感受性と,より遅い誘導性抵抗性の発現を示しています.
科学分野:
- 微生物学
- 感染症
- 薬理学について
背景:
- Mycobacterium abscessus複合体 (MABC) は肺疾患 (MABC- PD) を引き起こし,抗生物質耐性が高いため治療が困難である.
- アジトロマイシン (AZI) やクラリトロマイシン (CLA) のようなマクロライドは主要な治療法ですが,その比較効果と耐性開発については議論されています.
研究 の 目的:
- AZIとCLAのインビトロ有効性をMABCの臨床単離物と比較する.
- 誘導性および獲得性マクロリド耐性の発達を評価する.
- MABC- PD患者における耐性と治療結果の関連性を評価する.
主な方法:
- AZIとCLAの最小抑制濃度 (MIC) は,MABC単離物について決定された.
- 誘発性および獲得性耐性の発生率は,遺伝子転写とともに比較された.
- マクロライド治療を受けた61人のMABC- PD患者の培養変換率をモニタリングした.
主要な成果:
- AZIは,MABC単離に対するCLAの4~8倍以上のMICを示した.
- 誘導可能なマクロリド耐性,特に機能的なERMを持つMycobacterium abscessusでは,CLAよりもAZIでより速く発達した.
- 耐性単離体 (erm(41) または rrl 変異を持つ患者は,培養物の変換率が低かった.
結論:
- In vitroの感受性および誘導性抵抗パターンは,MABC- PDの治療において,AZIよりもCLAを好む.
- マクロライド耐性メカニズムは,MABC- PDにおける治療失敗に大きく寄与する.
- 耐性プロファイルの理解は,MABC- PD治療の最適化に不可欠です.
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