The prevalence of potential pathogenic bacteria in nasopharyngeal samples from healthy children and adults

Gunnarsson, Ronny K., Holm, Stig E., and Söderström, Margareta (1998) The prevalence of potential pathogenic bacteria in nasopharyngeal samples from healthy children and adults. Scandinavian Journal of Primary Health Care, 16 (1). pp. 13-17.

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Abstract

Objective – To elucidate the prevalence of potential pathogenic bacteria in nasopharyngeal samples from healthy individuals, and the influence on the carrier rate of age, season of the year, and type of child day care.

Design – Nasopharyngeal swab samples obtained in routine medical care from individuals with no sign of infection were studied in 159 pre-school children aged below 7 years, 198 schoolchildren aged 7–15 years, and 261 adults (• 16 years).

Results – The prevalence of pathogenic bacteria in healthy individuals decreased with age. The overall isolation frequencies for pre-school children, schoolchildren, and adults, respectively, were: Moraxella catarrhalis (27%, 4% and 2%); Streptococcus pneumoniae (19%, 6% and 0.8%); Haemophilus influenzae (13%, 6%and 3%). The prevalence of S. pneumoniae in children 7–15 years was higher during the summer than in the winter. We could not confirm any variation in the carrier rate due to the type of child day care.

Conclusion – Potentially pathogenic bacteria are often present in nasopharyngeal samples from healthy individuals, and the nasopharyngeal samples taken from healthy pre-school children, but rarely from people ≥ 16 years of age. This means that the use of nasopharyngeal samples to discriminate between bacterial and viral respiratory tract infection needs to be evaluated further in patients ≥ 16 years. The importance of the seasonal variation in the prevalence of potential pathogenic bacteria in the nasopharynx needs further study.

Item ID: 30785
Item Type: Article (Research - C1)
ISSN: 1502-7724
Keywords: respiratory tract infection; child day care centres; nasopharyngeal culture; carriers
Date Deposited: 24 Feb 2014 02:47
FoR Codes: 11 MEDICAL AND HEALTH SCIENCES > 1103 Clinical Sciences > 110303 Clinical Microbiology @ 20%
11 MEDICAL AND HEALTH SCIENCES > 1103 Clinical Sciences > 110309 Infectious Diseases @ 30%
11 MEDICAL AND HEALTH SCIENCES > 1117 Public Health and Health Services > 111717 Primary Health Care @ 50%
SEO Codes: 92 HEALTH > 9201 Clinical Health (Organs, Diseases and Abnormal Conditions) > 920109 Infectious Diseases @ 40%
92 HEALTH > 9201 Clinical Health (Organs, Diseases and Abnormal Conditions) > 920115 Respiratory System and Diseases (incl. Asthma) @ 20%
92 HEALTH > 9204 Public Health (excl. Specific Population Health) > 920404 Disease Distribution and Transmission (incl. Surveillance and Response) @ 40%
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