Clostridium Difficile Clinical Trial
Official title:
Dynamics of Colonization and Infection by Multidrug-Resistant Pathogens in Immunocompromised and Critically Ill Patients
The goal of this observational study is to investigate how bacterial populations from the intestine and mouth of patients change during the hospitalization period and evaluate if some populations of specific bacteria increase or decrease the risk of acquiring an infection or becoming colonized by pathogenic bacteria. Participants will have the following samples collected during enrollment: stool samples (maximum 2x/week), blood draws (1x/week), oral swab (1x/week).
The objectives of this study are to dissect the main microbial, clinical, and antimicrobial resistance determinants that impact colonization and infection by vancomycin-resistant enterococci (VRE), extended-spectrum beta-lactamase producing Enterobacterales (ESBL-E), carbapenem-resistant Enterobacterales (CRE), and Clostridium difficile; to evaluate the role of commensal microbiota in VRE, ESBL-E/CRE, and C. difficile colonization, and to define the functional aspects of keystone microbiota and mechanisms of protection against colonization/infection. Patients will be recruited from both intensive care units (n=500) and stem cell transplant units (n=500) and will be followed until discharge from these units, or for a maximum of four weeks. In addition to stool, blood, and oral samples, enrolled patients will have clinical data collected by chart review to evaluate colonization/infection-related clinical status, microbiological laboratory information, exposure to antibiotics, and clinical outcomes. Positive clinical cultures taken during the course of hospitalization will also be collected for analysis. ;
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