Journal of Dental Research, Vol 66, 1663-1667, Copyright © 1987 by International & American Associations for Dental Research Online Journals

ARTICLES

Cross-inhibition between black-pigmented Bacteroides species

A. J. Van Winkelhoff, N. Kippuw and J. De Graaff
Department of Oral Microbiology, Academic Center for Dentistry (ACTA), Vrije Universiteit, Amsterdam, The Netherlands.

Cross-inhibition within the group of black-pigmented Bacteroides, including both oral and non-oral strains, was studied by means of a membrane filter technique. It was found that B. gingivalis possessed the most extended inhibitory capacity among all species tested. B. gingivalis showed inhibitory activity against B. intermedius, B. endodontalis, B. loescheii, and B. melaninogenicus. B. endodontalis was active against some B. intermedius strains. Among the saccharolytic species, some B. melaninogenicus strains were inhibitory for some B. endodontalis strains, some B. gingivalis strains, and some B. intermedius strains. These inhibitory activities observed in vitro may play a role in the colonization of the periodontal pocket.

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