Helicobacter pylori transiently in the mouth may participate in the transmission of infection
Mem. Inst. Oswaldo Cruz
;
105(5): 657-660, Aug. 2010. tab
Article
Dans Anglais
| LILACS
| ID: lil-557225
ABSTRACT
Helicobacter pylori infection is associated with peptic ulcer and gastric carcinoma. The oral cavity may be a reservoir for H. pylori; however, the results of studies on this subject are controversial. We employed single-step and nested polymerase chain reactions (PCR) to detect the presence of the vacA, ureA and 16S rDNA genes of H. pylori in the stomach, saliva and dental plaque of 30 subjects. The results were confirmed by sequencing. Nested 16S rDNA and ureA amplification was achieved in 80 percent of gastric, 30 percent of saliva and 20 percent of dental plaque specimens. Sequencing of 10, seven and four 16S rDNA products from stomach, saliva and dental plaque, respectively, showed > 99 percent identity with H. pylori. Sequencing of the other four oral cavity PCR products showed similarity with Campylobacter and Wolinella species. Additionally, the vacA genotype identified in the samples of different sites was the same within a given subject.H. pylori may be found in the oral cavity of patients with gastric infection, thus it could be a source of transmission. However, results obtained with detection methods based only on PCR should be interpreted with caution because other microorganisms that are phylogenetically very close to H. pylori are also present in the mouth.
Texte intégral:
Disponible
Indice:
LILAS (Amériques)
Sujet Principal:
Salive
/
Estomac
/
Helicobacter pylori
/
Infections à Helicobacter
/
Plaque dentaire
/
Dyspepsie
Limites du sujet:
Femelle
/
Humains
/
Mâle
langue:
Anglais
Texte intégral:
Mem. Inst. Oswaldo Cruz
Thème du journal:
Médecine tropicale
/
Parasitologie
Année:
2010
Type:
Article
Pays d'affiliation:
Brésil
Institution/Pays d'affiliation:
Universidade Federal de Minas Gerais/BR
/
Universidade do Grande Rio/BR
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