Influence of previous antimicrobial therapy on oral carriage of beta-lactamase producing Capnocytophaga isolates.
OBJECTIVE
In order to assess the prevalence of beta-lactamase producing oral bacteria in childhood, the influence of different parameters on the oral carriage of Capnocytophaga was studied in a specific population of children with cancer. The examined parameters included clinical observation of oropharyngeal mucosa, type of malignant disease and intake of chemotherapy and antimicrobial treatment.


METHODS
The gingival and mucosal status of the patients was recorded before each sampling procedure. Samples were collected by oropharyngeal swabbing in children with leukaemia or other oncological diseases for isolation of Capnocytophaga strains.


RESULTS
Capnocytophaga strains were more often isolated in samples from children with oncological diseases (71%) other than leukaemia (57%). Concomitant chemotherapy had no influence on oral Capnocytophaga carriage. A significant decrease of the prevalence of Capnocytophaga strains isolated was observed in children who received antimicrobial treatment within 8 days before the sampling procedure (15.5% vs. 28%). But, the incidence of beta-lactamase-producing strains was not linked to previous antimicrobial treatments.


CONCLUSIONS
Oral carriage of Capnocytophaga strains can be linked to haematological disease and previous antibiotherapy, but results did not confirm that beta-lactamase treatments exert a selective pressure. Other factors might be involved in emerging for oral beta-lactamase-producing Capnocytophaga strains.
Equipe de Microbiologie, UPRES-EA 1254, Université de Rennes, Rennes, France. anne.gougeon@univ-rennes1.fr
Anne
A
Jolivet-Gougeon
Jacques
J
Guérin
Zohreh
Z
Tamanai-Shacoori
Virginie
V
Gandemer
Jean-Louis
JL
Sixou
Martine
M
Bonnaure-Mallet
D000293:Adolescent; D000900:Anti-Bacterial Agents / Q000627:therapeutic use*; D002206:Capnocytophaga / Q000201:enzymology / Q000302:isolation & purification*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D009369:Neoplasms / Q000382:microbiology*; D009960:Oropharynx / Q000382:microbiology*; D001618:beta-Lactamases / Q000096:biosynthesis*
D000900:Anti-Bacterial Agents; D001618:beta-Lactamases