長期にわたる直腸スランプのメタゲノム次世代配列解析により,カルバペネム耐性腸菌にコロニー化された患者の微生物群およびレジストームの特徴化
John A Fissel1, Yehudit Bergman2,3, Victoria L Campodónico2,4
1TriCore Reference Laboratories, Albuquerque, NM, USA.
JAC-antimicrobial resistance
|September 2, 2025
まとめ
カーバペネム耐性腸内細菌 (CRE) でコロニー化された高リスク患者は,微生物ではなく,異なる腸内抵抗体を示します. 抗生物質への曝露は 時間の経過とともに 微生物群とレジストームの両方を 大きく変化させます
科学分野:
- 微生物学
- ゲノミクス
- 感染症
背景:
- カーバペネム耐性腸菌 (CRE) は,特に高リスクの患者集団において,重大な脅威となっている.
- ホストの微生物群,レジストーム,CREのコロニー化との相互作用を理解することは,感染制御に極めて重要です.
研究 の 目的:
- 腸内微生物群とレジストームの違いを評価する.
- CRE状態と抗生物質被曝に関連した微生物群とレジストームの縦断的な変化を調査する.
主な方法:
- 既知のCREコロニゼーション状態の85人の高リスク患者からの直腸スランプの長時間メタジェノミック次世代シーケンシング (mNGS).
- 分析には,アルファ多様性,ベータ多様性,相対的多量,および微生物群とレジストームのLEfSeの比較が含まれていた.
- 時間の変化を追跡するために,患者のサブセットから連続したスワンプの縦断分析.
主要な成果:
- 微生物群の構成 (アルファとベータの多様性,相対的多量) は,CRE陽性とCRE陰性コホート間の最小の違いを示した.
- CRE陽性患者のベータ・ラクタム耐性遺伝子および他の抗菌剤耐性遺伝子の濃縮により,レジストーム分析により有意な差異が明らかになった.
- 長距離分析では,抗生物質の曝露は,微生物群とレジストームの組成の両方で劇的な変化に関連していることが示されました.
結論:
- 微生物群は微妙な違いを示したが,レジストームはCREコロニーとコロニー化されていない高リスク患者の間で有意に異なった.
- 腸内微生物とレジストームのダイナミックなシフトは,特に病院での抗生物質介入によって影響を受けます.
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