strep-a-check ( e-y laboratories , san mateo , ca ) is a 15-min chromogenic test for a species-specific aminopeptidase that could replace testing bacitracin susceptibility for presumptive identification of group a streptococci as well as 6.5 % nacl agar tolerance for presumptive identification of enterococcal streptococci , with a time savings of 24 hr .
C0038395
strep
C0004599
bacitracin