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Article: Bacterial and yeast flora of root surface caries in elderly, ethnic Chinese

TitleBacterial and yeast flora of root surface caries in elderly, ethnic Chinese
Authors
KeywordsChinese
Elderly
Epidemiology
Microbiology
Root caries
Yeast
Issue Date2002
PublisherWiley-Blackwell Publishing, Inc.. The Journal's web site is located at http://www.wiley.com/bw/journal.asp?ref=1354-523X&site=1
Citation
Oral Diseases, 2002, v. 8 n. 4, p. 207-217 How to Cite?
Abstract
OBJECTIVES: Root caries is emerging as a significant problem in the middle aged and elderly. As little data is available on the microbiology of root caries in Chinese cohorts, we evaluated 30 such lesions in elderly, institutionalized, ethnic Chinese. METHODS: Samples of carious dentine were aseptically taken from root caries lesions of 18 subjects (five males and 13 females, mean age 79.67 ± 8.57). The cultivable bacteria, both aerobic and anaerobic, were isolated and identified using standard methods and commercial identification kits. The yeasts were isolated on Sabouraud's agar and identified using the API system. RESULTS: The main findings were: (1) of the total isolates, 91.09% were Gram-positive and 8.91% were Gram-negative microorganisms; (2) the proportions of cocci and rods were 36.68 and 63.31%, respectively; (3) the predominant groups of organisms isolated were Streptococcus spp., Lactobacillus spp., Staphylococcus spp. and Actinomyces spp. with isolation frequencies of 100, 90.00, 73.33 and 63.33%, respectively; (4) the isolation frequency of yeasts belonging to Candida spp. (63.33%) was notably high although the proportion of yeasts within each sample was low (0.01%). Candida dubliniensis, a newly identified yeast species particularly prevalent in HIV infection, comprised 14.29% of yeasts. CONCLUSIONS: This study provides baseline information on the microbiologic features of root caries in the elderly, ethnic Chinese. Whilst our data on the most predominant bacteria isolated in root caries concur with those from other regions of the world the isolation of C. dubliniensis from these lesions has not been documented before.
Persistent Identifierhttp://hdl.handle.net/10722/67095
ISSN
2013 Impact Factor: 2.404
ISI Accession Number ID
References

 

Author Affiliations
  1. The University of Hong Kong
  2. Prince Philip Dental Hospital
DC FieldValueLanguage
dc.contributor.authorShen, Sen_HK
dc.contributor.authorSamaranayake, LPen_HK
dc.contributor.authorYip, HKen_HK
dc.contributor.authorDyson, JEen_HK
dc.date.accessioned2010-09-06T05:51:55Z-
dc.date.available2010-09-06T05:51:55Z-
dc.date.issued2002en_HK
dc.identifier.citationOral Diseases, 2002, v. 8 n. 4, p. 207-217en_HK
dc.identifier.issn1354-523Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/67095-
dc.description.abstractOBJECTIVES: Root caries is emerging as a significant problem in the middle aged and elderly. As little data is available on the microbiology of root caries in Chinese cohorts, we evaluated 30 such lesions in elderly, institutionalized, ethnic Chinese. METHODS: Samples of carious dentine were aseptically taken from root caries lesions of 18 subjects (five males and 13 females, mean age 79.67 ± 8.57). The cultivable bacteria, both aerobic and anaerobic, were isolated and identified using standard methods and commercial identification kits. The yeasts were isolated on Sabouraud's agar and identified using the API system. RESULTS: The main findings were: (1) of the total isolates, 91.09% were Gram-positive and 8.91% were Gram-negative microorganisms; (2) the proportions of cocci and rods were 36.68 and 63.31%, respectively; (3) the predominant groups of organisms isolated were Streptococcus spp., Lactobacillus spp., Staphylococcus spp. and Actinomyces spp. with isolation frequencies of 100, 90.00, 73.33 and 63.33%, respectively; (4) the isolation frequency of yeasts belonging to Candida spp. (63.33%) was notably high although the proportion of yeasts within each sample was low (0.01%). Candida dubliniensis, a newly identified yeast species particularly prevalent in HIV infection, comprised 14.29% of yeasts. CONCLUSIONS: This study provides baseline information on the microbiologic features of root caries in the elderly, ethnic Chinese. Whilst our data on the most predominant bacteria isolated in root caries concur with those from other regions of the world the isolation of C. dubliniensis from these lesions has not been documented before.en_HK
dc.languageengen_HK
dc.publisherWiley-Blackwell Publishing, Inc.. The Journal's web site is located at http://www.wiley.com/bw/journal.asp?ref=1354-523X&site=1en_HK
dc.relation.ispartofOral Diseasesen_HK
dc.subjectChineseen_HK
dc.subjectElderlyen_HK
dc.subjectEpidemiologyen_HK
dc.subjectMicrobiologyen_HK
dc.subjectRoot cariesen_HK
dc.subjectYeasten_HK
dc.titleBacterial and yeast flora of root surface caries in elderly, ethnic Chineseen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1354-523X&volume=8&spage=207&epage=217&date=2002&atitle=Bacterial+and+Yeast+Flora+of+Root+Surface+Caries+in+Elderly,+Ethnic+Chinese.en_HK
dc.identifier.emailSamaranayake, LP: lakshman@hku.hken_HK
dc.identifier.emailYip, HK: kevin.h.k.yip@hkusua.hku.hken_HK
dc.identifier.emailDyson, JE: jdyson@hkucc.hku.hken_HK
dc.identifier.authoritySamaranayake, LP=rp00023en_HK
dc.identifier.authorityYip, HK=rp00027en_HK
dc.identifier.authorityDyson, JE=rp00003en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1034/j.1601-0825.2002.01796.xen_HK
dc.identifier.scopuseid_2-s2.0-0036021287en_HK
dc.identifier.hkuros79949en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0036021287&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume8en_HK
dc.identifier.issue4en_HK
dc.identifier.spage207en_HK
dc.identifier.epage217en_HK
dc.identifier.isiWOS:000176662500006-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridShen, S=7403431743en_HK
dc.identifier.scopusauthoridSamaranayake, LP=7102761002en_HK
dc.identifier.scopusauthoridYip, HK=25423244900en_HK
dc.identifier.scopusauthoridDyson, JE=23089868600en_HK

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