Antimicrobial Susceptibilities of <i>Porphyromonas gingivalis</i> , <i>Prevotella intermedia</i> , and <i>Prevotella nigrescens</i> spp. Isolated in Spain

Abstract

The susceptibilities of 143 Porphyromonas gingivalis, Prevotella intermedia, and Prevotella nigrescens isolates to 18 antimicrobial agents were tested. All P. gingivalis isolates were susceptible. In contrast, some Prevotella spp. (17%) were resistant to beta-lactams, erythromycin, clindamycin, or tetracycline and carried resistance genes, ermF or tetQ, or beta-lactamases.