Microbiome and Host Susceptibility in Severe Pneumonia, a Prospective, Multicenter, Cohort Study

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Total Enrollment

2000 participants

Study Classification

OBSERVATIONAL

Study Start Date

2023-09-25

Study Completion Date

2026-12-31

Brief Summary

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This study was a prospective multicenter cohort of severe pneumonia. And by collecting clinical samples to clarify the correlation between lung microbiome, intestinal microbiome, host susceptibility, and prognosis of severe pneumonia patients.

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Detailed Description

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The human lung and intestinal microbiota play an important role in human health. At present, the correlation between lung and intestinal microbiota in severe pneumonia patients and host susceptibility is limited to small sample, single center studies. Due to sample size limitations, the pathogenesis of severe pneumonia caused by many pathogens remains unclear. This study plans to construct sputum, alveolar lavage fluid, feces, and whole blood samples of severe pneumonia patients admitted to the ICU from 2023 to 2025, and collect clinical data from patients to identify changes in lung and intestinal microbiome, host susceptibility, and disease progression risk in different groups of patients.

Conditions

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Severe Pneumonia

Study Design

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Observational Model Type

COHORT

Study Time Perspective

PROSPECTIVE

Study Groups

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Severe pneumonia

Definition of severe pneumonia: New infection that meets one of the following definitions: the patient receives mechanical ventilation (invasive or non-invasive) due to acute respiratory failure, with a PEEP level of 5cm or above; The patient receives high flow oxygen therapy with a FiO2 of 50% or more and a PaO2: FiO2 ratio of less than 300; The patient receives oxygen treatment with a partial respiration mask with an air storage bag, provided that PaO2 is lower than the pre-specified indicator.

Metagenomics

Intervention Type DIAGNOSTIC_TEST

Clinical metagenomics is used to evaluate pathogens

Interventions

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Metagenomics

Clinical metagenomics is used to evaluate pathogens

Intervention Type DIAGNOSTIC_TEST

Eligibility Criteria

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Inclusion Criteria

1\. New lung infection that meets one of the following definitions: the patient receives mechanical ventilation (invasive or non-invasive) due to acute respiratory failure, with a PEEP level of 5cm or above; Patients receiving high flow oxygen therapy with a FiO2 of 50% or more and a PaO2: FiO2 ratio below 300