Penicillin-resistant Streptococcus pneumoniae in the netherlands: Results of a 1-year molecular epidemiologic survey

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Abstract

The molecular epidemiologic characteristics of penicillin-resistant pneumococci in the Netherlands were investigated in 1995. Dutch electronic surveillance data showed that 0.7% of all pneumococci were intermediately resistant and 0.4% were highly resistant to penicillin. From March 1995 to March 1996, 89 penicillin-resistant isolates were collected by 39 medical microbiology laboratories. Thirty different genotypes were observed by restriction fragment end labeling. Twenty-one DNA types were unique, whereas 9 distinct genotypes were shared by ≤2 isolates. Different serogroups were found within 6 of the 9 genetically identical clusters of penicillin- resistant isolates, suggesting that horizontal transfer of capsular genes is common. Finally, nosocomial transmission of penicillin resistant pneumococci was observed among 21 elderly adults with chronic obstructive pulmonary disease. This study demonstrates that multiple clones of penicillin-resistant pneumococci have been introduced in the Netherlands, a country with a low prevalence of pneumococcal infection. Some clones spread among the population in and outside hospitals.

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Hermans, P. W. M., Sluijter, M., Elzenaar, K., Van Veen, A., Schonkeren, J. J. M., Nooren, F. M., … De Groot, R. (1997). Penicillin-resistant Streptococcus pneumoniae in the netherlands: Results of a 1-year molecular epidemiologic survey. Journal of Infectious Diseases, 175(6), 1413–1422. https://doi.org/10.1086/516474

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