Spatial spreading of West Nile Virus described by traveling waves
Spatial spreading of West Nile Virus described by traveling waves
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DOI：
10.1016/j.jtbi.2008.12.032
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发表时间：
2009-06-07
影响因子：
2
通讯作者：
Yang, Hyun Mo
中科院分区：
文献类型：
--
作者：
Maidana, Norberto Anibal;Yang, Hyun Mo
在这项工作中，我们提出了一个空间模型来分析西尼罗河病毒在美国的传播，从东到西。西尼罗河病毒是一种节肢动物传播的黄病毒，1999年夏天首次出现在纽约市，随后在鸟类中大量传播。哺乳动物，如人类和马，没有发展足够高的血流滴度在传播中发挥重要作用，这是考虑蚊-鸟循环的原因。该模型的目的是研究这种传播的偏微分反应扩散方程系统的基础上，考虑到蚊子和鸟类种群。扩散和平流运动是允许的两个群体，是在鸟类比蚊子种群。研究了该模型的行波解，以确定疾病传播的速度。该波速作为模型参数的函数获得，以评估控制策略。西尼罗河病毒从纽约市传播到加州州是由于鸟类的扩散和平流运动。蚊虫活动在疾病传播中不起重要作用，而鸟类平流成为降低蚊虫叮咬率的重要因素。(C)2009爱思唯尔有限公司保留所有权利。
In this work, we propose a spatial model to analyze the West Nile Virus propagation across the USA, from east to west. West Nile Virus is an arthropod-borne flavivirus that appeared for the first time in New York City in the summer of 1999 and then spread prolifically among birds. Mammals, such as humans and horses, do not develop sufficiently high bloodstream titers to play a significant role in the transmission, which is the reason to consider the mosquito-bird cycle. The model aims to study this propagation based on a system of partial differential reaction-diffusion equations taking the mosquito and the avian populations into account. Diffusion and advection movements are allowed for both populations, being greater in the avian than in the mosquito population. The traveling wave solutions of the model are studied to determine the speed of disease dissemination. This wave speed is obtained as a function of the model's parameters, in order to assess the control strategies. The propagation of West Nile Virus from New York City to California state is established as a consequence of the diffusion and advection movements of birds. Mosquito movements do not play an important role in the disease dissemination, while bird advection becomes an important factor for lower mosquito biting rates. (C) 2009 Elsevier Ltd. All rights reserved.