The basic reproduction number R0 and effectiveness of reactive interventions during dengue epidemics: the 2002 dengue outbreak in Easter Island, Chile.

The basic reproduction number R0 and effectiveness of reactive interventions during dengue epidemics: the 2002 dengue outbreak in Easter Island, Chile.
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DOI:
10.3934/mbe.2013.10.1455
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发表时间:
2013-10
期刊:
Mathematical biosciences and engineering : MBE
影响因子:
--
通讯作者:
Hyman JM
Hyman JM
中科院分区:
其他
文献类型:
--
作者:
Chowell G;Fuentes R;Olea A;Aguilera X;Nesse H;Hyman JM

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我们使用随机模拟模型来探索在2002年在智利复活节岛的小人口中爆发登革热期间,反应性干预策略的效果。我们量化了干预措施对传播动力学和流行病大小的影响,作为模拟控制强度水平和控制干预措施启动时间的函数。由于复活节岛在2002年之前没有报告登革热暴发,2002年的疫情提供了一个独特的机会,在控制干预措施开始之前的最初流行阶段估计基本繁殖数量ℛ0。我们估计ℛ为27.2(95%可信区间:14.8,49.3)。我们发现,最终的疫情规模对开始干预的时间高度敏感。然而,即使在疫情发生几周后开始控制干预措施,反应性干预努力也可能对最终的疫情规模产生重大影响。我们的结果表明,快速实施控制干预措施对缩小登革热疫情的流行规模具有显著效果。
We use a stochastic simulation model to explore the effect of reactive intervention strategies during the 2002 dengue outbreak in the small population of Easter Island, Chile. We quantified the effect of interventions on the transmission dynamics and epidemic size as a function of the simulated control intensity levels and the timing of initiation of control interventions. Because no dengue outbreaks had been reported prior to 2002 in Easter Island, the 2002 epidemic provided a unique opportunity to estimate the basic reproduction number ℛ0 during the initial epidemic phase, prior to the start of control interventions. We estimated ℛ0 at 27.2 (95%CI: 14.8, 49.3). We found that the final epidemic size is highly sensitive to the timing of start of interventions. However, even when the control interventions start several weeks after the epidemic onset, reactive intervention efforts can have a significant impact on the final epidemic size. Our results indicate that the rapid implementation of control interventions can have a significant effect in reducing the epidemic size of dengue epidemics.
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