Scientists again have found that when one becomes infected with a pathogen changes occur in the microbial community that enhances one's ability to combat the harmful bacteria. The strength of one's resistance varies from person to person, according to Apollo Stacey of the National Institute of Health laboratory of Host Immunity.
It has been known that antibiotic use in people promotes expansion of Clostridium difficile, a bacterium that causes severe diarrhoea and inflammation of the colon, leading to a high risk of disease and death. Likewise, Salmonella enterica and C. rodentium respond to microbiota in the gut to strength or weaken their virulence. Stacey's team found that a naturally produced chemical in the body called taurine nourishes and trains the microbiota to promote its resistance to subsequent infection.