β-Lactamase-producing Moraxella catarrhalis may prevent the emergence of penicillin-resistant Streptococcus pneumoniae in children with recurrent acute otitis media

We studied the effect of concomitant nasopharyngeal carriage of β-lactamase producing Moraxella catarrhalis and Haemophilus influenzae on the occurrence of penicillin resistance of Streptococcus pneumoniae. We took nasopharyngeal samples from 306 children with recurrent otitis media and a history of...

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Veröffentlicht in:International journal of pediatric otorhinolaryngology 2002-05, Vol.63 (3), p.219-222
Hauptverfasser: Joki-Erkkilä, Veli-Pekka, Aittoniemi, Janne, Vuento, Risto, Puhakka, Heikki
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Sprache:eng
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Zusammenfassung:We studied the effect of concomitant nasopharyngeal carriage of β-lactamase producing Moraxella catarrhalis and Haemophilus influenzae on the occurrence of penicillin resistance of Streptococcus pneumoniae. We took nasopharyngeal samples from 306 children with recurrent otitis media and a history of several antibiotic treatments. We could isolate at least one of the pathogens in 89 subjects. Of these children 13% carried more than one pathogen. Of the isolated M. catarrhalis and H. influenzae strains 93% and 43% produced β-lactamase, respectively. Of the S. pneumoniae strains 25% were non-susceptible (I/R) to penicillin. However, in patients carrying β-lactamase-producing M. catarrhalis together with pneumococci all strains were susceptible to penicillin ( P=0.0353). This finding suggests that β-lactamase producing M. catarrhalis may hinder the emergence of penicillin resistance of S. pneumoniae in children with recurrent acute otitis media.
ISSN:0165-5876
1872-8464
DOI:10.1016/S0165-5876(02)00012-5