[Oropharyngeal flora. Epidemiologic survey of prevalence].
OBJECTIVE
Epidemiological surveys which are not frequently carried out in medical practice should provide useful information for the choice of antibiotics to be prescribed in community-acquired infections particularly with the recent development of therapeutic difficulties due to resistant strains. We therefore analyzed the prevalent pharyngeal flora in a general patient population.


METHODS
The study was conducted during a single 24-hour period in 1991 by 43 general practitioners and included 645 subjects consulting for benign affections. No patient selection was made. Two pharyngeal swabs were obtained from each subject and cultured in aerobic and anaerobic conditions. Internationally accepted methods for identifying bacteria in pharyngeal samples all performed by one well-equipped laboratory. Beta-lactamase activity was determined with the nitrocephine technique, both directly and after culture.


RESULTS
Patient age varied from 16 to 45 years; most (68.5%) consulted for reasons other than ear-nose-throat affections. Only 41 patients (4.3%) consulted for sore throat and 65.4% had not received antibiotics for at least 6 months. Haemophilus influenzae was found in 59.6% of the patients, 20% of the strains were beta-lactamase producers as were 83.7% of the Moraxella catarrhalis strains identified.


CONCLUSIONS
These factors are indicators of potential risk of therapeutic failure when using beta-lactams unstable to beta-lactamases for the treatment of pharyngeal infections.
Service de Microbiologie, Hôpital Bichat-Claude Bernard, Paris.
E
E
Bergogne-Bérézin
P
P
Mariani-Kurkdjian
C
C
Doit
C
C
Saint-Martin
E
E
Bingen
N
N
Lambert-Zechovsky
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D004756:Enterobacteriaceae Infections / Q000201:enzymology / Q000453:epidemiology / Q000382:microbiology; D006192:Haemophilus Infections / Q000201:enzymology / Q000453:epidemiology* / Q000382:microbiology; D006306:Health Surveys; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008875:Middle Aged; D016870:Neisseriaceae Infections / Q000453:epidemiology* / Q000382:microbiology; D010612:Pharyngitis / Q000453:epidemiology* / Q000382:microbiology; D015995:Prevalence; D013203:Staphylococcal Infections / Q000201:enzymology / Q000453:epidemiology* / Q000382:microbiology; D013290:Streptococcal Infections / Q000453:epidemiology* / Q000382:microbiology; D001618:beta-Lactamases / Q000378:metabolism
D001618:beta-Lactamases
Flores oropharyngées. Enquête épidémiologique de prévalence.