Occurrence of yeasts, pseudomonads and enteric bacteria in the oral cavity of patients undergoing head and neck radiotherapy
Braz. j. microbiol
;
42(3): 1047-1055, July-Sept. 2011. tab
Article
Dans Anglais
| LILACS
| ID: lil-607534
ABSTRACT
The aim of this study was to evaluate the occurrence of yeasts, pseudomonads and enteric bacteria in the oral cavity of patients undergoing radiotherapy (RT) for treatment of head and neck cancer. Fifty patients receiving RT were examined before, during and 30 days after RT. Saliva, mucosa, and biofilm samples were collected and microorganisms were detected by culture and polymerase chain reaction (PCR). The most prevalent yeasts in patients submitted to RT were Candida albicans, C. tropicalis, C. krusei, C. glabrata and C. parapsilosis. Citrobacter, Enterobacter, Enterococcus, Klebsiella, Proteus, and Pseudomonas were the most frequently cultivated bacteria. Before RT, targeted bacteria were cultivated from 22.2 percent of edentulous patients and 16.6 percent of dentate patients; 30 days after RT, these microorganisms were recovered from 77.8 percent edentulous and 46.8 percent dentate patients. By PCR, these microorganisms were detected from all edentulous patients, 78.1 percent of dentate patients. The presence of Gram-negative enteric roads and fungi was particularly frequent in patients presenting mucositis level III or IV. Modifications in the oral environment due to RT treatment seem to facilitate the colonization of oral cavity by members of family Enterobacteriaceae, genera Enterococcus and Candida.
Texte intégral:
Disponible
Indice:
LILAS (Amériques)
Sujet Principal:
Radiothérapie
/
Procédures de chirurgie opératoire
/
Levures
/
Techniques in vitro
/
Réaction de polymérisation en chaîne
/
Enterobacteriaceae
/
Infections à Enterobacteriaceae
/
Bouche
/
Noma
Type d'étude:
Études d'évaluation
/
Étude de prévalence
/
Facteurs de risque
Limites du sujet:
Humains
langue:
Anglais
Texte intégral:
Braz. j. microbiol
Thème du journal:
Microbiologie
Année:
2011
Type:
Article
/
descriptif de projet
Pays d'affiliation:
Brésil
/
Nigeria
Institution/Pays d'affiliation:
Universidade Estadual Paulista/BR
/
Universidade de São Paulo/BR
/
University of Lagos/NG
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