Abstract:
:The biochemical characteristics and the presence of human Fc(gamma) receptors of 52 throat isolates of group C beta-hemolytic streptococci were examined. Among these isolates, 38 were identified as "Streptococcus milleri" and 14 were identified as "Streptococcus equisimilis." The differentiation of group C "S. equisimilis" from "S. milleri" with identical group antigens was easy to perform by the measurement of the size of the hemolytic zone on a sheep blood agar plate in an anaerobic atmosphere and by biochemical tests (Voges-Proskauer test). A clear-cut criterion for differentiation was noted among these isolates, i.e., the presence of Fc(gamma) receptors. "S. equisimilis," which are generally associated with pharyngitis, possess human Fc(gamma) receptors, while "S. milleri", which are generally isolated from healthy persons, have no such receptors.
journal_name
J Clin Microbioljournal_title
Journal of clinical microbiologyauthors
Lebrun L,Guibert M,Wallet P,de Maneville MM,Pillot Jdoi
10.1128/JCM.24.5.705-707.1986subject
Has Abstractpub_date
1986-11-01 00:00:00pages
705-7issue
5eissn
0095-1137issn
1098-660Xjournal_volume
24pub_type
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