An Approach to the Taxonomy of Gram-positive Anaerobic Cocci. 3. Antimicrobial Susceptibility Testing

Thumbnail Image
Journal Title
Journal ISSN
Volume Title
Sebha University
Antibiotics and dye susceptibility tests have been used by several investigators as selective agents or as presumptive procedures for the identification of anaerobes. In this study a total of 76 strains of Gram-positive anaerobic cocci (GPAC) were tested against five antibiotics (Oleandomycin, Vancomycin, Gentamycin, Tobramycin and Cephradine, and three dyes (Brilliant green, Crystal violet and Gentian violet), using agar plate dilution methods. Although the data of the susceptibility of GPAC to the tested antibiotics and dyes were of no use for the classification of these cocci, it could be concluded that Cephradine and Vancomycin are efficacious antibiotics against GPAC. However, Gentamycin and Tobramycin displayed an activity against Megosphaera (M.) elsdenii and Streptococcus (Str.) intermedius. In addition, Tobramycin was active against Gaffkya (G.) anaerobia, Peptococcus (Pc.) asaccharolyticus, Pc. prevotii and Pc. saccharolyticus, whilst all GPAC were resistant to Oleandomycin.