title: Heterogeneity of apparently pure anaerobic cultures: a possible source of error in susceptibility testing.
mesh_terms: D001431:Bacteriological Techniques; D001441:Bacteroides fragilis / Q000187:drug effects*; D002981:Clindamycin / Q000494:pharmacology*; D006801:Humans; D008826:Microbial Sensitivity Tests / Q000379:methods*; D013045:Species Specificity
chemical_list: D002981:Clindamycin