Comparison of microtiter broth dilution and agar dilution methods for susceptibility testing of Eikenella corrodens

Eikenella corrodens is a slow-growing, capnophilic, gram-negative rod which often grows poorly in liquid media. Consequently, the agar dilution technique is the method of choice for susceptibility testing of E. corrodens. We report a new microtiter broth dilution method for susceptibility testing of E. corrodens which compared favorably with results obtained by the agar dilution technique. Minimal bactericidal concentrations correlated well with minimal inhibitory concentrations.