当前位置: X-MOL 学术Expert Rev. Vaccines › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Residual colonization by vaccine serotypes in rural South Africa four years following initiation of pneumococcal conjugate vaccine immunization.
Expert Review of Vaccines ( IF 6.2 ) Pub Date : 2020-04-10 , DOI: 10.1080/14760584.2020.1750377
Shabir A Madhi 1, 2 , Susan A Nzenze 1, 2 , Marta C Nunes 1, 2 , Lilian Chinyanganya 1, 2 , Nadia Van Niekerk 1, 2 , Kathleen Kahn 3, 4, 5 , Rhine Twine 3 , Linda De Gouveia 6 , Anne Von Gottberg 6 , Tinevimbo Shiri 1, 2, 7
Affiliation  

BACKGROUND We evaluated pneumococcal colonization in children and adults between the time of 7-valent pneumococcal conjugate vaccine (PCV) introduction in the immunization program in 2009 to two years after transitioning to PCV13 in 2011. METHODS Community-based carriage surveillance was undertaken between May-November 2013 (Period-3), with similar surveys in 2009 (Period-1) and 2011 (Period-2). Households with children below two years had a similar probability of being sampled in all surveys. Nasopharyngeal swabs were processed using standard methods and serotyped by Quellung. RESULTS In children>9-59 months old, overall pneumococcal colonization prevalence declined from 81.8% in Period-1 to 65.0% in Period-3 (p<0.001). Reductions of 70% (41.2% vs. 13.6%) in PCV7-serotypes colonization and 66% (15.3% vs. 4.4%) for the six additional PCV13-serotypes (PCV13-add6VT) were observed. There was, however, high residual colonization by PCV7-serotypes 19F (14.9% vs. 6.3%) and 23F (8.5% vs. 4.1%), despite reduction of 57% and 52%, respectively. Among individuals>12 years of age, there was 61% reduction in PCV7-serotype colonization (3.1% vs. 1.3%) and 75% decrease for PCV13-add6VT (2.1% vs. 0.6%) between Period-1 and Period-3. CONCLUSIONS The residual prevalence of serotypes 19F and 23F, four years after introducing PCV in the South Africa, suggests ongoing community transmission and transient vaccine effects.

中文翻译:

肺炎球菌结合疫苗免疫开始后四年,在南非农村地区按疫苗血清型残留定植。

背景我们评估了2009年免疫计划中引入7价肺炎球菌结合疫苗(PCV)到2011年过渡为PCV13后的两年之间儿童和成人的肺炎球菌定植情况。 2013年11月(期间3),2009年(期间1)和2011年(期间2)进行了类似的调查。子女低于两年的家庭在所有调查中被抽样的可能性相似。鼻咽拭子采用标准方法进行处理,并由Quellung进行血清分型。结果在> 9-59个月大的儿童中,肺炎球菌的总体定殖率从第1阶段的81.8%降至第3阶段的65.0%(p <0.001)。PCV7血清型定植减少70%(41.2%比13.6%)和66%(15.3%比4。观察到另外六种PCV13血清型(PCV13-add6VT)占4%。然而,尽管分别减少了57%和52%,但PCV7血清型19F(14.9%比6.3%)和23F(8.5%比4.1%)的残留菌落很高。在1岁至3期之间,> 12岁的个体中,PCV7血清型定植减少了61%(3.1%对1.3%),PCV13-add6VT减少了75%(2.1%对0.6%)。 。结论在南非引入PCV四年后,19F和23F血清型的残留流行率表明,社区传播和持续性疫苗作用仍在持续。在期间1和期间3之间,PCV7血清型定植减少了61%(3.1%对1.3%),而PCV13-add6VT减少了75%(2.1%对0.6%)。结论在南非引入PCV四年后,19F和23F血清型的残留流行率表明,社区持续传播和暂时性疫苗效应。在期间1和期间3之间,PCV7血清型定植减少了61%(3.1%对1.3%),而PCV13-add6VT减少了75%(2.1%对0.6%)。结论在南非引入PCV四年后,19F和23F血清型的残留流行率表明,社区传播和持续性疫苗作用仍在持续。
更新日期:2020-04-10
down
wechat
bug