LABORATORY FOR THE PROPHYLACTIC PENICILLIN STUDY II

本合同的目标是：1）通过以下方式识别干扰： 青霉素预防对获得抗S. 肺炎链球菌; 2）评估青霉素抗性S. 肺炎; 3）停止青霉素预防后，比较 患者中记录细菌感染的发生率 有儿童接受青霉素的人群; 4）确定是否 5岁以上继续青霉素预防治疗会干扰 血清抗体对加强免疫的反应， 肺炎球菌疫苗或随后开发的天然 血清抗S.肺炎; 5）以确定，在儿童 链球菌肺炎感染，如果他们有可检测的血清 感染血清型的抗体;以及6）确定患者是否 患有严重肺炎球菌感染的患者血清 抗体滴度。肺炎前感染或反应 与肺炎球菌疫苗相比， 患者无感染。

The objectives of this contract are to 1) identify interference by penicillin prophylaxis on the acquisition of antibodies to S. pneumoniae; 2) assess the emergence of penicillin resistant S. pneumoniae; 3) upon cessation of penicillin prophylaxis, compare the incidence of documented bacterial infection in that patient population with children receiving penicillin; 4) to determine if continued penicillin prophylaxis beyond 5 years of age interferes with the serum antibody response to booster immunization with the pneumococcal vaccine or subsequent development of natural serum antibodies to S. pneumoniae; 5) to determine, in children with S. pneumoniae infection, if they had detectable serum antibody to the infecting serotype; and 6) to determine if patients who develop severe pneumococcal infection have lower serum antibody titers to S. pneumoniae before infection or respond suboptimally to the pneumococcal vaccine as compared to patients without infection.