报告人：高道舟 上海师范大学
报告时间：2020年1月7日 上午10：00
报告地点：逸夫馆407室
报告内容简介：
Title: Habitat Fragmentation Promotes Malaria Persistence
Abstract: Malaria is a parasitic infection spread by the bites of infected Anopheles mosquitoes. An estimated 219 million malaria cases and 435,000 deaths occurred worldwide in 2017. Human movement brings a big challenge to malaria control and elimination. Based on a Ross-Macdonald type model with n identical patches, we study the role of the movement of humans and/or mosquitoes on the persistence of malaria and prove that the basic reproduction number of the multipatch model, R0(n), is always greater than or equal to that of the single patch model, R0(1). Biologically, this means that habitat fragmentation or patchiness promotes disease outbreaks and intensifies disease persistence. Numerical examples for two patches are given to investigate how the multipatch reproduction number varies with human and/or mosquito movement. The reproduction number can surpass any given value whenever an appropriate travel pattern is chosen. Fast human and/or mosquito movement decreases the infection risk, but may increase the total number of infected humans.
