Bacterial pathogens of acute sinusitis in the osteomeatal complex during common colds and wellness

Background: Pathogenic bacteria have been cultured from the osteomeatal complex (OMC) in one‐third of adults with apparent acute bacterial sinusitis; however, it is not known whether bacteria are present in the OMC during uncomplicated viral colds in adults. Methods: Adult volunteers were recruited for a study during wellness and at the time of acute common cold. Swab cultures were obtained from the OMC and from the nasopharynx by 2 routes (through the nose and through the mouth). Swab eluates were inoculated on selective agars to detect S. pneumoniae , H. influenzae , and M. catarrhalis.Results: Bacterial pathogens were detected in the OMC more frequently during common colds than during wellness (31% vs 8%, p < 0.008). Pathogens detected in the OMC were always present in the nasopharynx of the subject. Conclusion: Bacterial pathogens are present in the OMC in a subgroup of adult patients with uncomplicated upper respiratory illness/common cold. The nasopharynx appears to be the reservoir for bacterial pathogens in the OMC. © 2011 ARS‐AAOA, LLC.