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Science:全球变暖将疟疾推向热带高海拔地区

2014-03-07 佚名 生物360

历史上,热带较高海拔地区的较为凉爽的气温为人们提供了一些免于感染疟原虫的庇护所,因为当气温低的时候,蚊媒难以完成其生命周期,而疟原虫的复制速度也会减慢。 然而,日前来自密歇根大学(University of Michigan)等机构的研究人员在《科学》(Sciecne)杂志上报告称,他们发现当较高海拔地区的气温升高时,在这些高度的疟疾病例会同步地变得 更为常见,尤其是在非洲及南美洲的高原地区,如

历史上,热带较高海拔地区的较为凉爽的气温为人们提供了一些免于感染疟原虫的庇护所,因为当气温低的时候,蚊媒难以完成其生命周期,而疟原虫的复制速度也会减慢。

然而,日前来自密歇根大学(University of Michigan)等机构的研究人员在《科学》(Sciecne)杂志上报告称,他们发现当较高海拔地区的气温升高时,在这些高度的疟疾病例会同步地变得 更为常见,尤其是在非洲及南美洲的高原地区,如果全球暖化趋势持续不减,这种情况可能会是疟疾蔓延至人口稠密的高原地区的一个重大问题。

因此,研究人员从哥伦比亚西部的 124 个不同的城市及埃塞俄比亚中部的 159 个行政单位采集了详细的时空数据。他们分析了疟疾病例的垂直分布并发现,确实,在较暖和的年份中,在较高海拔地区会有更多的疟疾病例报告。

此后,研究人员创建了一个能够说明诸如杀虫剂及抗虐药物使用等因素的模型,且该模型预测,如果情况没有得到缓解,温度只要上升 1 度,仅在这两个大陆上就会造成每年增加成千上万的疟疾感染病例。

原始出处:

A. S. Siraj, M. Santos-Vega, M. J. Bouma, D. Yadeta, D. Ruiz Carrascal, and M. Pascual. Altitudinal Changes in Malaria Incidence in Highlands of Ethiopia and Colombia. Science, 7 March 2014; DOI:10.1126/science.1244325

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    2014-10-17 zsyan
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    2014-03-09 jichang

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