在口腔微生物群中丰富的致病细菌可能与老年人的复发性肺部感染有关
Jingyi Xu1,2, Ruyi Qu1, Keke Yang1
1Department of Geriatrics, Shanghai Fourth People's Hospital Affiliated to Tongji University, Shanghai, 200434, China.
Aging clinical and experimental research
|August 13, 2025
概括
老年人的肺部感染与口腔和肠道细菌的变化有关. 复发性肺炎在口腔中显示出较高的金黄色葡萄球菌和Klebsiella肺炎,影响感染风险.
科学领域:
- 微生物学 微生物学
- 老年学是指老年学的学科.
- 传染性疾病 传染性疾病
背景情况:
- 肺部感染对老年人群构成重大风险.
- 人口老龄化需要专注于老年人的健康,特别是感染.
研究的目的:
- 调查口腔和肠道微生物群与老年人肺部感染之间的关系.
- 为了识别与肺炎和复发性肺炎相关的特定微生物特征.
主要方法:
- 从老年患者 (78-98岁) 收集了喉拭子和便样本.
- 使用16S rRNA基因测序分析了微生物群.
- 使用PICRUSt和MetaCyc路径注释进行了功能预测.
主要成果:
- 在对照组和感染组之间观察到明显的口腔和肠道微生物群多样性.
- 在肺炎患者的口腔微生物群中发现金黄色葡萄球菌增加,在复发性肺炎患者中发现Klebsiella pneumoniae.
- 在所有感染群体的肠道微生物群中注意到Enterococcus hirae的丰富.
- 在复发性感染病例中确定了D-葡萄糖酸和D-银糖酸降解途径的升高.
结论:
- 在复发性肺炎的老年患者和常见肺炎患者之间,口腔和肠道微生物群存在显著差异.
- 在口腔微生物群中S. aureus和K. pneumoniae的增加为肺炎病因提供了洞察力.
- 增加K. pneumoniae的数量可能会增加老年人对肺部感染的易感性.
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