米国における侵襲性大腸菌感染症
Heather N Grome1, Joshua M Brandenburg1, Alyssa G Kent1
1Division of Healthcare Quality Promotion, Centers for Disease Control and Prevention, Atlanta, Georgia.
JAMA network open
|February 2, 2026
まとめ
侵襲性大腸菌感染症は、特に高齢者において、懸念される薬剤耐性率とともに、重大な公衆衛生上の脅威となっている。本研究は、侵襲性大腸菌(EIEC)に対する予防戦略の強化が急務であることを強調している。
科学分野:
- 感染症; 疫学; 微生物学
背景:
- 腸管外侵襲性大腸菌(EIEC)感染症は、敗血症および入院の主要な原因である。EIECにおける薬剤耐性は増大する懸念であり、治療および患者の転帰を複雑にしている。
研究 の 目的:
- 米国における侵襲性大腸菌感染症の疫学を決定すること。これらの感染症の臨床的および分子的特徴を明らかにすること。
主な方法:
- 米国の9つの地域における積極的な検査室ベースおよび人口ベースのサーベイランスデータを用いたコホート研究。2023年6月から8月までの720万人以上の個人からのデータが含まれ、診療記録および分離株の特徴を分析した。
主要な成果:
- 本研究では、EIECの1345例が特定され、年間発生率は人口10万人あたり74.7例であった。感染は60歳以上の患者に多く、糖尿病が頻繁に見られる基礎疾患であった。シプロフロキサシン(25.9%)およびトリメトプリム-スルファメトキサゾール(28.8%)に対する耐性を含む、高い薬剤耐性率が観察された。
結論:
- 侵襲性大腸菌疾患は、特に高齢者層に不均衡に影響を与える、実質的な公衆衛生上の負担を表している。高い薬剤耐性率は、効果的な公衆衛生予防活動と抗菌薬適正使用の必要性を強調している。
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