Microbiological, Immunological and Biochemical Characteristics of the Development of Ventilator Associated Pneumonia

The respiratory microbiome plays a critical role in metabolism, immune system
maturation, and protection against pathogens. Traditionally, respiratory
microbiology in pneumonia focused on identifying a specific pathogen, often
disregarding normal oral flora as contaminants. However, recent research
highlights the importance of the pulmonary microbiome's altered composition
(dysbiosis) and its association with diseases such as Ventilator-Associated
Pneumonia (VAP). The relationship between dysbiosis and immune dysregulation
remains unclear, raising questions about whether dysbiosis is a cause or
consequence of disease progression. This dataset explores the respiratory
microbiome's role in nosocomial lower respiratory tract infections in ICU
patients.

This prospective, observational dataset was built in an ICU in Chia, Colombia,
focusing on adult patients requiring mechanical ventilation without initial
pneumonia. Clinical data and biological samples, including bronchoalveolar
lavage, orotracheal secretion, and blood, were collected at multiple time
points. Microbiome analysis involved DNA extraction, gene sequencing of the
16S ribosomal unit, and bioinformatic analysis to characterize microbial
diversity. Concurrently, pulmonary, and systemic inflammatory markers were
quantified using ELISA.

The dataset enrolled 141 patients, generating a comprehensive dataset on
demographic, clinical, and microbiome variables. This research not only
provides insights into the microbial ecology of VAP but also establishes a
repository of data for future studies. The findings underscore the complex
interplay between the microbiome and disease in critically ill patients, with
implications for improving clinical outcomes in the ICU setting.

呼吸道微生物组（respiratory microbiome）在代谢、免疫系统成熟及抵御病原体（pathogens）方面发挥关键作用。传统上，肺炎相关的呼吸道微生物学（respiratory microbiology）研究侧重于识别特定病原体，常将正常口腔菌群（oral flora）视为污染物而忽略。然而，近期研究强调了肺部微生物组（pulmonary microbiome）组成改变（dysbiosis）及其与呼吸机相关性肺炎（Ventilator-Associated Pneumonia, VAP）等疾病的关联。菌群失调（dysbiosis）与免疫失调（immune dysregulation）之间的关系仍不明确，引发了关于菌群失调是疾病进展的原因还是结果的疑问。本数据集旨在探究呼吸道微生物组在重症监护室（ICU）患者院内下呼吸道感染（nosocomial lower respiratory tract infections）中的作用。

这是一个前瞻性观察数据集（prospective observational dataset），构建于哥伦比亚Chia市的某重症监护室（ICU），研究对象为需要机械通气（mechanical ventilation）且初始无肺炎的成年患者。临床数据及生物样本（包括支气管肺泡灌洗液（bronchoalveolar lavage）、气管分泌物（orotracheal secretion）和血液）在多个时间点采集。微生物组分析包括DNA提取、16S核糖体亚基（16S ribosomal unit）基因测序以及生物信息学分析（bioinformatic analysis），以表征微生物多样性（microbial diversity）。同时，采用酶联免疫吸附试验（ELISA）对肺部及全身炎症标志物（inflammatory markers）进行定量分析。

本数据集纳入141例患者，生成了涵盖人口统计学（demographic）、临床及微生物组变量的综合数据集。该研究不仅为VAP的微生物生态学（microbial ecology）提供了见解，还为未来研究建立了数据资源库（repository）。研究结果强调了重症患者中微生物组与疾病之间的复杂相互作用（complex interplay），对改善ICU环境下的临床结局（clinical outcomes）具有重要意义。