Anaerobic bacteria in maxillary sinusitis.

The anaerobic bacterial flora of purulent maxillary sinusitis was investigated in 30 patients and the different anaerobic species identified and tested with respect to antibiotic susceptibility. Most strains were identified as anaerobic cocci. Non-sporeforming Gram-positive rods and Gram-negative rods other than Bacteroides fragilis were also isolated. The majority of the strains were susceptible to benzylpenicillin, cefoxitin, clindamycin, doxycycline, metronidazole and chloramphenicol.