Insights into the Role of Human Gut Microbiota in Infection.

infection (CDI) has emerged as a major health problem worldwide. A major risk factor for disease development is prior antibiotic use, which disrupts the normal gut microbiota by altering its composition and the gut's metabolic functions, leading to the loss of colonization resistance and subsequent CDI. Data from human studies have shown that the presence of , either as a colonizer or as a pathogen, is associated with a decreased level of gut microbiota diversity.