Rates and significance of nonrandom distribution by PCR/ESI-MS emm group.

Overall rate of antibiotic resistance among all GAS emm groups, and the significance of nonrandom association between emm group and antibiotic resistance. aIncludes both intermediate and fully resistant isolates, as per CLSI definitions. p values represent the probability that the observed distribution of resistance among the types resulted from a random distribution among the real population. Pearson tests were run using Monte Carlo method; N = 10,000.ERY, erythromycin; CLI, clindamycin; TET, tetracycline; LEV, levofloxacin; OFX, ofloxacin; CHL, chloramphenicol.