Prevalence, distribution of serotypes, and cariogenic potential in hamsters of mutans streptococci from elderly individuals.
Identifieur interne : 00D984 ( Main/Merge ); précédent : 00D983; suivant : 00D985Prevalence, distribution of serotypes, and cariogenic potential in hamsters of mutans streptococci from elderly individuals.
Auteurs : D B Fitzgerald ; R J Fitzgerald ; B O Adams ; R E MorhartSource :
- Infection and Immunity [ 0019-9567 ] ; 1983.
Descripteurs français
- KwdFr :
- Adulte d'âge moyen, Animaux, Bouche édentée (microbiologie), Caries dentaires (microbiologie), Caries dentaires (étiologie), Cricetinae, Femelle, Humains, Mâle, Prothèse dentaire complète, Salive (microbiologie), Streptococcus mutans (), Streptococcus mutans (isolement et purification), Streptococcus mutans (pathogénicité), Sujet âgé, Sérotypage.
- MESH :
- isolement et purification : Streptococcus mutans.
- microbiologie : Bouche édentée, Caries dentaires, Salive.
- pathogénicité : Streptococcus mutans.
- étiologie : Caries dentaires.
- Adulte d'âge moyen, Animaux, Cricetinae, Femelle, Humains, Mâle, Prothèse dentaire complète, Streptococcus mutans, Sujet âgé, Sérotypage.
English descriptors
- KwdEn :
- Aged, Animals, Cricetinae, Dental Caries (etiology), Dental Caries (microbiology), Denture, Complete, Female, Humans, Male, Middle Aged, Mouth, Edentulous (microbiology), Saliva (microbiology), Serotyping, Streptococcus mutans (classification), Streptococcus mutans (isolation & purification), Streptococcus mutans (pathogenicity).
- MESH :
- classification : Streptococcus mutans.
- etiology : Dental Caries.
- isolation & purification : Streptococcus mutans.
- microbiology : Dental Caries, Mouth, Edentulous, Saliva.
- pathogenicity : Streptococcus mutans.
- Aged, Animals, Cricetinae, Denture, Complete, Female, Humans, Male, Middle Aged, Serotyping.
Abstract
The prevalence of mutans streptococci (Streptococcus mutans, Streptococcus cricetus, Streptococcus sobrinus, and Streptococcus rattus) was determined in the salivas of 169 elderly individuals ranging in age from 60 to 87 years. Approximately 40% of these individuals were edentulous and wore full upper and lower dentures. With the exception of a higher proportion of saliva counts below 1,000 CFU/ml in the full-denture wearers, the prevalence and the serotype and species distributions of the mutans streptococci were similar in the denture wearers and individuals with natural teeth only. The species and serotype distributions of mutans streptococci in this elderly population were also consistent with reported observations of other workers on younger, more caries-prone populations. A total of 87 representative isolates of the mutans streptococci were tested for cariogenic potential in a hamster model system. A considerable degree of variation in virulence between different strains was observed. However, these differences were not relatable to individual species or serotypes or to whether the organisms were isolated from denture wearers or naturally dentate subjects. The results of our studies indicate that elderly individuals with either natural or artificial dentitions may be a hitherto unrecognized reservoir of mutans streptococci having varying degrees of potential cariogenicity. Hence, in close family situations they could serve, along with parents and siblings, as vectors in the initial transmission of cariogenic microorganisms to young children.
Url:
PubMed: 6874072
PubMed Central: 264697
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PMC:264697Le document en format XML
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<term>Dental Caries (microbiology)</term>
<term>Denture, Complete</term>
<term>Female</term>
<term>Humans</term>
<term>Male</term>
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<term>Mouth, Edentulous (microbiology)</term>
<term>Saliva (microbiology)</term>
<term>Serotyping</term>
<term>Streptococcus mutans (classification)</term>
<term>Streptococcus mutans (isolation & purification)</term>
<term>Streptococcus mutans (pathogenicity)</term>
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<keywords scheme="KwdFr" xml:lang="fr"><term>Adulte d'âge moyen</term>
<term>Animaux</term>
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<term>Caries dentaires (étiologie)</term>
<term>Cricetinae</term>
<term>Femelle</term>
<term>Humains</term>
<term>Mâle</term>
<term>Prothèse dentaire complète</term>
<term>Salive (microbiologie)</term>
<term>Streptococcus mutans ()</term>
<term>Streptococcus mutans (isolement et purification)</term>
<term>Streptococcus mutans (pathogénicité)</term>
<term>Sujet âgé</term>
<term>Sérotypage</term>
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<term>Caries dentaires</term>
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<front><div type="abstract" xml:lang="en"><p>The prevalence of mutans streptococci (Streptococcus mutans, Streptococcus cricetus, Streptococcus sobrinus, and Streptococcus rattus) was determined in the salivas of 169 elderly individuals ranging in age from 60 to 87 years. Approximately 40% of these individuals were edentulous and wore full upper and lower dentures. With the exception of a higher proportion of saliva counts below 1,000 CFU/ml in the full-denture wearers, the prevalence and the serotype and species distributions of the mutans streptococci were similar in the denture wearers and individuals with natural teeth only. The species and serotype distributions of mutans streptococci in this elderly population were also consistent with reported observations of other workers on younger, more caries-prone populations. A total of 87 representative isolates of the mutans streptococci were tested for cariogenic potential in a hamster model system. A considerable degree of variation in virulence between different strains was observed. However, these differences were not relatable to individual species or serotypes or to whether the organisms were isolated from denture wearers or naturally dentate subjects. The results of our studies indicate that elderly individuals with either natural or artificial dentitions may be a hitherto unrecognized reservoir of mutans streptococci having varying degrees of potential cariogenicity. Hence, in close family situations they could serve, along with parents and siblings, as vectors in the initial transmission of cariogenic microorganisms to young children.</p>
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