J Med Microbiol Email Content Delivery
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

This Article
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Tagg, J. R.
Right arrow Articles by Wong, H. K.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Tagg, J. R.
Right arrow Articles by Wong, H. K.
Agricola
Right arrow Articles by Tagg, J. R.
Right arrow Articles by Wong, H. K.

The Journal of Medical Microbiology, Vol 16, Issue 4 409-415, Copyright © 1983 by Society for General Microbiology

JOURNAL ARTICLE

Inhibitor production by group-G streptococci of human and of animal origin

J. R. Tagg and H. K. Wong

Strains of group-G streptococci were tested by a "fingerprinting" method for the production of (P typing) and sensitivity to (S typing) inhibitory agents, and were biotyped. In the standard P-typing test, 28 of 50 strains of human origin, but none of 30 strains of animal origin, showed inhibitory activity. Of the human strains, 12 formed a bacteriocin that was active on group-A streptococci, including three (strains I2, I5 and I8) of the four streptococci of this group among the indicator strains. Sixteen other human strains inhibited the fourth group-A indicator (strain I7), and to a lesser extent strain I2, by lowering the pH of the typing medium. This acid-mediated inhibition was eliminated by testing on a medium containing calcium carbonate 0.5%; the 16 strains were then completely non-inhibitory, and the bacteriocin-forming strains, the typing pattern of which had originally been I2, I5, I7, I8, showed only inhibition attributable to the action of the bacteriocin. Nearly all group-A streptococci were sensitive to the group-G bacteriocin. The indicator strain I7 and several other members of M-type 28 were exceptions, but their resistance was not associated with the presence of R-antigen 28. Fifteen inhibitor-sensitivity patterns and 12 biotypes were identified among the strains; some of these tended to be associated with either a human or an animal origin. Neither S type nor biotype appeared to correlate with inhibitor production.


This article has been cited by other articles:


Home page
 Appl. Environ. Microbiol.Home page
O. Hyink, P. A. Wescombe, M. Upton, N. Ragland, J. P. Burton, and J. R. Tagg
Salivaricin A2 and the Novel Lantibiotic Salivaricin B Are Encoded at Adjacent Loci on a 190-Kilobase Transmissible Megaplasmid in the Oral Probiotic Strain Streptococcus salivarius K12
Appl. Envir. Microbiol., February 15, 2007; 73(4): 1107 - 1113.
[Abstract] [Full Text] [PDF]

Home page
 MicrobiologyHome page
N. C. K. Heng, N. L. Ragland, P. M. Swe, H. J. Baird, M. A. Inglis, J. R. Tagg, and R. W. Jack
Dysgalacticin: a novel, plasmid-encoded antimicrobial protein (bacteriocin) produced by Streptococcus dysgalactiae subsp. equisimilis
Microbiology, July 1, 2006; 152(7): 1991 - 2001.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
INT J SYST EVOL MICROBIOL J MED MICROBIOL MICROBIOLOGY J GEN VIROL ALL SGM JOURNALS
Copyright © 1983 Society for General Microbiology.