A method of assessing erythromycin-resistant strains of Staphylococcus aureus for their susceptibility to the antibiotic clindamycin. Erythromycin-impregnated disks are placed near clindamycin, or lincomycin-impregnated disks on a growth medium, and the effect of inducible erythromycin resistance on the inhibition of bacterial growth around the clindamycin disk is assessed. A flattening of the zone of inhibition around the clindamycin disk is indicative of clindamycin drug resistance.
SYN: SEE: disk diffusion induction test
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