ArticleBMC infectious diseases2011
Increase in serotype 19A prevalence and amoxicillin non-susceptibility among paediatric Streptococcus pneumoniae isolates from middle ear fluid in a passive laboratory-based surveillance in Spain, 1997-2009.
Article in BMC infectious diseases, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers, 3 of them syntheses that pooled it.
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10 citing papers in PubMed, 3 syntheses or guidelines pooled it.
- Serotype distribution of invasive and non-invasive pneumococcal disease in children ≤5 years of age following the introduction of 10- and 13-valent pneumococcal conjugate vaccines in infant national immunization programs: a systematic literature review.Frontiers in public health · 2025Pooled it
- Predominant Bacteria Detected from the Middle Ear Fluid of Children Experiencing Otitis Media: A Systematic Review.PloS one · 2016Pooled it
- Pooled it
- Application of pharmacokinetic/pharmacodynamic analysis to evaluate the adequacy of antimicrobial therapy for pediatric acute otitis media in Spain before and after the introduction of the PCV7 vaccine.Revista espanola de quimioterapia : publicacion oficial de la Sociedad Espanola de Quimioterapia · 2019Article
- 13-valent pneumococcal conjugate vaccine: a review of its use in infants, children, and adolescents.Paediatric drugs · 2013Review
- Microbiological characterization of Streptococcus pneumoniae and non-typeable Haemophilus influenzae isolates as primary causes of acute otitis media in Bulgarian children before the introduction of conjugate vaccines.Annals of clinical microbiology and antimicrobials · 2013Article
- Article
- Invasive pneumococcal disease and 7-valent pneumococcal conjugate vaccine, the Netherlands.Emerging infectious diseases · 2012Article
- Decline and rise of the antimicrobial susceptibility of Streptococcus pneumoniae isolated from middle ear fluid in children: influence of changes in circulating serotypes.Antimicrobial agents and chemotherapy · 2012Article
- Update on the clinical utility and optimal use of cefditoren.International journal of general medicine · 2012Article
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6 authors.
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Abstract
backgroundConjugate vaccines, such as the 7-valent conjugate vaccine (PCV7), alter serotype nasopharyngeal carriage, potentially increasing cases of otitis media by non-vaccine serotypes.
methodsAll paediatric middle ear fluid (MEF) isolates received in the Spanish Reference Laboratory for Pneumococci through a passive, laboratory-based surveillance system from January 1997 to June 2009 were analysed. Data from 1997 to 2000 were pooled as pre-vaccination period. Trends over time were explored by linear regression analysis.
resultsA total of 2,077 isolates were analysed: 855 belonging to PCV7 serotypes, 466 to serotype 19A, 215 to serotype 3, 89 to serotype 6A and 452 to other serotypes (< 40 isolates each). Over time, there has been a decreasing trend for PCV7 serotypes (R(2) = 0.944; p < 0.001, with significant decreasing trends for serotypes 19F, 14, 23F and 9V), and increasing trends for serotype 19A (R(2) = 0.901; p < 0.001), serotype 3 (R(2) = 0.463; p = 0.030) and other non-PCV7 serotypes (R(2) = 0.877; p < 0.001), but not for serotype 6A (R(2) = 0.311; p = 0.094). Considering all isolates, amoxicillin non-susceptibility showed an increasing trend (R(2) = 0.528; p = 0.017). Regarding serotype 19A, increasing trends in non-susceptibility to penicillin (R(2) = 0.726; p = 0.001), amoxicillin (R(2) = 0.804; p < 0.001), cefotaxime (R(2) = 0.546; p = 0.005) and erythromycin (R(2) = 0.546; p = 0.009) were found, with amoxicillin non-susceptibility firstly detected in 2003 (7.4%) and increasing up to 38.0% in 2009. In PCV7 serotypes (which prevalence decreased from 70.7% during 1997-2000 to 10.6% in 2009) amoxicillin non-susceptibility rates showed an increasing trend (R(2) = 0.702; p = 0.002). However, overall, amoxicillin non-susceptibility (≈25% in 2008-9) could be mainly attributed to serotype 19A (> 35% isolates) since PCV7 strains represented < 11% of total clinical isolates.
conclusionsIn contrast to reports on invasive pneumococcal strains, in MEF isolates the reduction in the prevalence of PCV7 serotypes was not associated with decreases in penicillin/erythromycin non-susceptibility. The high prevalence of serotype 19A among paediatric MEF isolates and the amoxicillin non-susceptibility found in this serotype are worrisome since amoxicillin is the most common antibiotic used in the treatment of acute otitis media. These data suggest that non-PCV7 serotypes (mainly serotype 19A followed by serotypes 3 and 6A) are important etiological agents of acute otitis media and support the added value of the broader coverage of the new 13-valent conjugate vaccine.
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