Bacitracin and coagglutination for grouping of beta-hemolytic streptococci.

  • R A Stoner
  • Published 1978 in Journal of clinical microbiology


Bacitracin may be used for presumptive differentiation of group A from other beta-hemolytic streptococci. Whatever criteria are used for the test, a small number of erroneous results will be obtained. With the 1,161 strains studied in this laboratory, using a zone of 10 mm or greater as indicative of group A was better than using Maxted's original criterion… (More)


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