Journal
ORAL MICROBIOLOGY AND IMMUNOLOGY
Volume 23, Issue 2, Pages 127-130Publisher
BLACKWELL PUBLISHING
DOI: 10.1111/j.1399-302X.2007.00399.x
Keywords
Actinobacillus actinomycetemcomitans; ethidium bromide; rough colony; smooth colony
Funding
- NIDCR NIH HHS [DE15124] Funding Source: Medline
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Background/aims: Intergeneric bacterial coaggregation may play an important role in plaque development. Methods: In this study we investigated the coaggregation reaction between two periodontal pathogens, Aggregatibacter actinomycetemcomitans and Fusobacterium nucleatum. Results: Previous studies showed that A. actinomycetemcomitans serotype b strains coaggregate with F. nucleatum strain PK1594, and that A. actinomycetemcomitans serotype b O-polysaccharide (O-PS) is the receptor responsible for coaggregation between A. actinomycetemcomitans and F. nucleatum. A. actinomycetemcomitans serotype f O-PS has been shown to be structurally and antigenically related to serotype b O-PS. In the present study we show that A. actinomycetemcomitans strain CU1060N, a serotype f strain, also coaggregated with F. nucleatum PK1594. Like coaggregation between serotype b strains and F. nucleatum, coaggregation between CU1060N and F. nucleatum was inhibited by galactose. An O-PS mutant of CU1060N failed to coaggregate with F. nucleatum. Conclusion: We concluded that A. actinomycetemcomitans serotype f O-PS, like serotype b O-PS, mediates coaggregation between A. actinomycetemcomitans and fusobacteria.
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