Microbial Epidemiology and Chlorhexidine Suscebtibily of Oropharyngeal and Intestinal Colonization

In this prospective observational study we aim to determine the prevalence of oropharyngeal and rectal Gram-negative bacilli colonization in healthy subjects, and their susceptibility to chlorehexidine. We plan to recruit 100 healthy volunteers secondary endpoints are to determine the phylogentic characteristics of E. coli isolates; to compare the phylogentic characteristics of oropharyngeal and rectal of predominant GNB colonization.