Clinical isolates from oral infections and associated drug sensitivities

We isolated and identified microbes obtained by needle aspiration of closed abscesses in 72 patients with oral infections treated at this department of oral surgery. One hundred seventy-one strains were isolated, of which 92 strains (53.8%) were Gram-positive aerobes, 40 strains (23.4%) Gram-negative anaerobes, 31 strains (18.1%) Gram-positive anaerobes, and 8 strains (4.7%) Gram negative aerobes. The most common type of infection involved a combination of Gram-positive aerobes and anaerobes, with 63.9% of all infections involving anaerobes. Furthermore, when the minimum inhibitory concentrations of antibiotics commonly used in this department, including ampicillin (ABPC), cefaclor (CCL), and cefzinir (CFDN), were tested against the isolated organisms, all three drugs showed satisfactory results, although CCL was less active against aerophobic organisms. Very few highly resistant strains were found.