Estimating spatiotemporally varying malaria reproduction numbers in a near elimination setting.

Estimating spatiotemporally varying malaria reproduction numbers in a near elimination setting.
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DOI:
10.1038/s41467-018-04577-y
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发表时间:
2018-06-26
影响因子:
16.6
通讯作者:
Bhatt S
Bhatt S
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Routledge I;Chevéz JER;Cucunubá ZM;Rodriguez MG;Guinovart C;Gustafson KB;Schneider K;Walker PGT;Ghani AC;Bhatt S

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2016 年,世界卫生组织确定了 21 个国家可以在 2020 年之前消除疟疾。监测这一目标的进展需要跟踪持续的传播情况。在这里,我们开发了估计个体繁殖数及其随时间和空间变化的方法。个体传染数 Rc 描述了某个时间点的传播状态,与平均传染数不同,平均传染数是典型病例感染人数的平均值。我们使用 2010 年至 2016 年确诊疟疾病例的数据评估了萨尔瓦多的消除进展情况。我们的结果表明,虽然继发性疟疾病例的平均数量低于 1 例(0.61,95% CI 0.55-0.65),但个体繁殖数往往超过 1 例。我们估计 2010 年至 2016 年间 Rc 会下降。然而,我们也表明,如果进口保持在相同的速度,该国可能无法在 2020 年之前实现疟疾消除。已确定到 2020 年消除疟疾的国家有 21 个,需要不断评估其进展情况。在这里,作者提出了一种方法,可以估计个体繁殖数量及其随时间和空间的变化,并用它来监测 2010 年至 2016 年间萨尔瓦多的消除成功情况。
In 2016 the World Health Organization identified 21 countries that could eliminate malaria by 2020. Monitoring progress towards this goal requires tracking ongoing transmission. Here we develop methods that estimate individual reproduction numbers and their variation through time and space. Individual reproduction numbers, Rc, describe the state of transmission at a point in time and differ from mean reproduction numbers, which are averages of the number of people infected by a typical case. We assess elimination progress in El Salvador using data for confirmed cases of malaria from 2010 to 2016. Our results demonstrate that whilst the average number of secondary malaria cases was below one (0.61, 95% CI 0.55–0.65), individual reproduction numbers often exceeded one. We estimate a decline in Rc between 2010 and 2016. However we also show that if importation is maintained at the same rate, the country may not achieve malaria elimination by 2020. Twenty one countries have been identified for malaria elimination by 2020 and their progress needs to be constantly evaluated. Here, the authors present a method that estimates individual reproduction numbers and their variation through time and space and use it to monitor elimination success in El Salvador between 2010 and 2016.
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