Evaluation the Association of Microbiome Between Respiratory Tract Samples and Stool Samples in Pneumonic Patients Accompanied by Respiratory Failure

A prospective observational study. Enrolled participants admitted to ICU due to pneumonia and respiratory failure need mechanical ventilator support. Investigators collected the residual specimens, such as sputum from endotrachea aspiration, bronchoalveolar lavage fluid in those participants as the usual care in the ICU. Those residual samples were sent to extract RNA and sequence by using high-throughput sequencing (next-generation sequencing) method. Investigators will compared the microbiome feature between lower respiratory tract and stool specimens in those participants diagnosed as pneumonia with respiratory failure.