ABSTRACT
Objective: To review the types of bacteria found in rhinosinusitis and the prevalence of a beta-lactamase producing organism in a tertiary care hospital during the year 2004 and compared with our previous reports. Methods: Charts of patients who underwent endoscopic sinus surgery or maxillary antral puncture or endoscopic-guided culture at the Rhinology & Allergy Division, Department of Otolaryngology and the Department of Microbiology, Siriraj Hospital from January 2004 to December 2004 were reviewed. Information regarding the patient’s age, site of specimens, culture and sensitivity results were obtained. Results: There were 162 specimens and 29 bacterial species isolated. There were 50.4% positive aerobic cultures, gram-negative bacteria were more common than gram-positive bacteria (68.5% vs 31.5%). Common aerobes were Pseudomonas aeruginosa (16.2%), non-fermentative gram negative rod: NF-GNR (10.8%), Coagulase- negative Staphylococcus aureus :CNS (9.9%) and Klebsiella pneumoniae (9.9%).The most common anaerobes were Peptostreptococcus sp., Bacteroides fragilis and Fusobacterium sp. Conclusion: Contrary to our previous studies, gram negative organisms play a more important role than gram positive organisms. The causative pathogens of rhinosinusitis should be studied continuously because rapid progress in the development of new antimicrobial agents has a significant impact on their bacteriologic profile.