Objective To study the distribution of bacteria in chronic sinusitis and their sensitivity to commonly used antibiotics. Methods Bacteria culture and drug sensitivity test were carried out for the secretion of sinus obtained during endosco-pic sinus surgery for 50 patients with chronic sinusitis. Results Bacteria were observed in 70% of the species, including 42 strains of aerobes and 28 strains of anaerobes. Cefoperazone, ciprofloxacin, sulbactam and ampicillin were effective for aerobes, especially cefo...