Colonización nasal bacteriana en población sana de la ciudad de Santiago de Chile: ？Existe portación de Staphylococcus aureus meticilino resistente comunitario?

introduction: doesn't exists agreement about normal nasal flora. recently it has emerged community-associated methicillin-resistant staphylococcus aureus in people without known rísk factors, producing a global health scare. aim: look for normal nasal flora and test the presence oí mrsa-com. material ana method: descriptive and prospective study, between october 2007 and october 2008, in healthy people. was taken a sampling from nasal secretion, incubation and bacterial identification by conventional methods. results: studied population, average age 37.6±15.8years, 55% témale and 37.1% active smoking. we obtained 73%> of positive cultures. we identified 18 bacterial species, the most common was staphylococcus coagulase-negative (53%) and staphylococcus aureus (22.7%). was detected only one case ofmrsa, and his genetic test was negative to prove community origin. discusión: there is a high rate of nasal carriage of staphylococcus coagulase-negative, like to that reponed by international literature. although the prevalence found for s aureus is the usual, there were no mrsa-com positive samples. this indicates that in chile there is still no spread of clones of mrsa-com.