Population genomics of post-vaccine changes in pneumococcal epidemiology.

Population genomics of post-vaccine changes in pneumococcal epidemiology.
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DOI:
10.1038/ng.2625
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发表时间:
2013-06
期刊:
影响因子:
30.8
通讯作者:
Lipsitch, Marc
Lipsitch, Marc
中科院分区:
生物学1区
文献类型:
--
作者:
Croucher, Nicholas J.;Finkelstein, Jonathan A.;Pelton, Stephen I.;Mitchell, Patrick K.;Lee, Grace M.;Parkhill, Julian;Bentley, Stephen D.;Hanage, William P.;Lipsitch, Marc

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616个无症状携带的肺炎球菌的全基因组测序被用于研究7价肺炎球菌结合疫苗的影响。密切相关分离株的比较揭示了转化在促进胶囊转换为非疫苗血清型和出现耐药性方面的作用。然而,发现这种重组在物种间以显著不同的速率发生,并且群体的进化主要由疫苗接种前现存的不同基因型频率的变化驱动。这些改变在人群水平上对辅助基因组组成的总体影响很小,与疫苗引入后肺炎球菌疾病发病率的下降形成对比。
Whole genome sequencing of 616 asymptomatically carried pneumococci was used to study the impact of the 7-valent pneumococcal conjugate vaccine. Comparison of closely related isolates revealed the role of transformation in facilitating capsule switching to non-vaccine serotypes and the emergence of drug resistance. However, such recombination was found to occur at significantly different rates across the species, and the evolution of the population was primarily driven by changes in the frequency of distinct genotypes extant pre-vaccine. These alterations resulted in little overall effect on accessory genome composition at the population level, contrasting with the fall in pneumococcal disease rates after the vaccine’s introduction.
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