Table 5.

Correlation between erythromycin resistance and the presence of the resistance gene ermA, ermB,ermC, or msrA

SpeciesNo. of strains (type) tested by disk diffusion with erythromycinNo. of strains positive by PCR for:No. of PCR-negative strains
ermAermBermCmsrA
S. aureus73 (resistant)4352122
S. aureus133 (susceptible)0040129
S. epidermidis142 (resistant)9112480
S. epidermidis46 (susceptible)000046