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Table of Contents
Vol. 37, No. 5, 2003
Issue release date: September – October
Section title: Original Paper
Caries Res 2003;37:381–390
(DOI:10.1159/000072172)

Actinomyces spp. in Supragingival Plaque of Ethnic Chinese Preschool Children with and without Active Dental Caries

Tang G.a · Yip H.K.b · Samaranayake L.P.a · Luo G.a · Lo E.C.M.c · Teo C.S.d
aOral Bio-Sciences, bOral Diagnosis, cPeriodontology and Dental Public Health, Faculty of Dentistry, The University of Hong Kong, Hong Kong, SAR, China; dFaculty of Dentistry, National University of Singapore, Singapore

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Article / Publication Details

First-Page Preview
Abstract of Original Paper

Received: November 15, 2002
Accepted: March 18, 2003
Published online: August 27, 2003
Issue release date: September – October

Number of Print Pages: 10
Number of Figures: 2
Number of Tables: 5

ISSN: 0008-6568 (Print)
eISSN: 1421-976X (Online)

For additional information: http://www.karger.com/CRE

Abstract

Very limited molecular epidemiological data are available on the role of Actinomyces spp. in the pathogenesis of caries in the primary dentition. Therefore, we investigated their distribution in supragingival plaque of ethnic Chinese preschool children from Singapore and Hong Kong, either with or without active caries. Plaque samples were taken from intact interproximal enamel areas using dental floss. Bacterial genomic DNA of each sample was extracted and variable regions of 16S ribosomal DNA amplified and labelled with digoxigenin. Oligonucleotide probes specific for Actinomyces bovis, Actinomyces gerencseriae, Actinomyces israelii, Actinomyces meyeri, Actinomyces odontolyticus, catalase-negative Actinomyces naeslundii (genospecies 1 and 2) and catalase-positive Actinomyces naeslundii genospecies 2 (previously Actinomyces viscosus serotype II) were used to detect these species using Southern hybridization with a Minislot and Miniblotter system. A. odontolyticus, A. gerencseriae and A. meyeri were detected with similar frequency in both Singapore and Hong Kong samples or in those with and without active caries. However, the prevalence of A. naeslundii was significantly different in the two locales (p < 0.05). A. odontolyticus (88.7%), A. gerencseriae (56.6%) and A. naeslundii (50.9%) were detected in a majority of the samples and the positive hybridization signals of A. gerencseriae in the caries-active group were stronger than from the caries-free group. A. bovis and A. israelii were undetectable in any of the samples. These data imply that A. odontolyticus, A. naeslundii and A. gerencseriae may play an important role in supragingival plaque formation on primary teeth in ethnic Chinese, with others such as A. meyeri contributing.

© 2003 S. Karger AG, Basel


Article / Publication Details

First-Page Preview
Abstract of Original Paper

Received: November 15, 2002
Accepted: March 18, 2003
Published online: August 27, 2003
Issue release date: September – October

Number of Print Pages: 10
Number of Figures: 2
Number of Tables: 5

ISSN: 0008-6568 (Print)
eISSN: 1421-976X (Online)

For additional information: http://www.karger.com/CRE


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Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher or, in the case of photocopying, direct payment of a specified fee to the Copyright Clearance Center.
Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug.
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