Streptococcus pneumoniae Upper Respiratory Carriage in Costa Rican Children with Otitis Media before the Introduction of the Heptavalent Conjugated Vaccine in the National Immunization Program

Catalina Ulloa, A. Pereira, Carolina Soley, N. Porat, A. Abdelnour, R. Dagan, A. Arguedas
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Abstract

Objective: The aim of this study was to analyze the NP/OP S. pneumoniae serotype distribution and potential vaccine coverage in Costa Rican children with Otitis Media (OM) before the introduction of PCV-7 in the National Immunization Program (NIP). Methods: Between 2002 and 2006, NP and OP samples were obtained from 641 children from 6 to 79 months of age, at the time of OM diagnosis. S. pneumoniae serotyping and antimicrobial susceptibility were performed. Results: 386 S. pneumoniae isolates were recovered. The most common S. pneumoniae serotypes (ST) were: ST 6B, ST 14, ST 19F. Penicillin non-susceptibility was observed among 57% of the isolates obtained from children Conclusions: S. pneumoniae was isolated from the NP and/or OP in the majority (59%) of studied children with OM. At a statistical significant level, only serotype 3 was more frequently isolated among children >24 months of age. Antibiotic non-susceptibility and MDR were significantly higher in children
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在国家免疫规划中引入七价结合疫苗之前,哥斯达黎加中耳炎儿童的肺炎链球菌上呼吸道传播
目的:分析哥斯达黎加中耳炎(OM)儿童在国家免疫规划(NIP)引入PCV-7之前的NP/OP肺炎链球菌血清型分布和潜在疫苗覆盖率。方法:2002年至2006年间,对641例6 ~ 79月龄儿童进行OM诊断时的NP和OP样本采集。进行肺炎链球菌血清分型及药敏试验。结果:共分离出386株肺炎链球菌。最常见的肺炎链球菌血清型(ST)为:ST 6B、ST 14、ST 19F。结论:肺炎链球菌在大多数(59%)研究的OM患儿中从NP和/或OP分离。在有统计学意义的水平上,只有血清3型在0 ~ 24月龄的儿童中更常见。儿童的抗生素不敏感性和耐多药发生率明显高于儿童
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