通过培养和高通量测序来定义小肠道细菌过度生长
Gabriela Leite1, Ali Rezaie2, Ruchi Mathur3
1Medically Associated Science and Technology Program, Cedars-Sinai, Los Angeles, California.
概括
诊断小肠细菌过度生长 (SIBO) 的最佳门是≥10^3 CFU/mL,这与肠道微生物多样性降低和特定细菌过度生长有关. 这一发现有助于理解SIBO及其相关症状.
科学领域:
- 胃肠病学 胃肠病学
- 微生物学 微生物学
- 基因组学就是基因组学.
背景情况:
- 尽管取得了进展,但小肠细菌过度生长 (SIBO) 的最佳诊断标准和定义仍在争论中.
- 这项研究旨在使用小肠培养和测序来定义SIBO,以确定与胃肠道症状相关的关键微生物.
研究的目的:
- 通过使用十二指肠吸附培养和测序来确定SIBO的最佳诊断值.
- 确定与SIBO及其症状相关的特定微生物特征和代谢途径.
主要方法:
- 招募接受食管胃管腺镜术的受试者,采集十二指肠吸管.
- 使用MacConkey和血液亚格菌培养,16S核糖体RNA和猎枪测序来分析吸附物.
- 评估微生物多样性,网络连接性和与SIBO值相关的预测代谢功能.
主要成果:
- 确定≥10^3 CFU/mL的值是SIBO诊断的最佳值.
- SIBO受试者表现出十二指肠微生物α多样性降低和Escherichia/Shigella和Klebsiella的相对丰度增加.
- 增强碳水化合物发酵,和硫化生产的微生物通路与SIBO症状相关.
结论:
- 该研究证实≥10^3 CFU/mL是最佳的SIBO值,与微生物多样性减少和网络中断有关.
- 在SIBO中,和硫化代谢途径显著增强.
- 大肠杆菌和克莱布西拉菌株在SIBO微生物群中占主导地位,并且与症状严重程度相关.
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