title: Comparison of E test and agar dilution methods for determining antibiotic susceptibilities of anaerobic bacteria and viridans streptococci isolated from blood.
abstract: The antimicrobial susceptibilities of 311 strains of anaerobic bacteria and 140 strains of aerobic bacteria, isolated from blood after dental extraction, were determined by the E test and compared with the results obtained by the agar dilution method on PDM-ASM 2 agar. E test MICs agreed within +/-1 dilution step to the agar dilution MICs in 93%, 52%, 90%, 94% of the tested anaerobes for penicillin V, cefaclor, clindamycin and erythromycin, respectively. For aerobic bacteria the agreement was > or = 90% for the antibiotics tested. The in vitro activities of penicillin V, clindamycin and erythromycin were higher than the activity of cefaclor against the majority of bacteria tested.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Huddinge University Hospital, Karolinska Institute, Stockholm, Sweden.
authors.forename: G
authors.initials: G
authors.lastname: Hall
authors.forename: A
authors.initials: A
authors.lastname: Heimdahl
authors.forename: C E
authors.initials: CE
authors.lastname: Nord