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近15年来巴西的疟疾增加了76％,这些病例几乎全部集中在亚马孙河流域地区。这段时间,联邦政府通过国家移民和土改机构,在朗多尼亚省推行大规模的移民计划,安置了成千上万户移民家庭。每年从全国各地迁往巴西西部朗多尼亚的移民接近20万人。其主要迁往地是该省东北角的Machadinho。移民面临的最严重的问题之一是疟疾。1985年,在一个有5000人口的移民区患疟人次达12000次,平均每人每年患疟超过2次。除了亚马孙丛林的金矿地区以外,这里的发病率是巴西最高的,移民中2/3的人已得了疟疾。
Malaria in Brazil has increased by 76% over the past 15 years, with almost all of these cases concentrated in the Amazon Basin. During this time, the federal government, through national immigration and land reform agencies, launched a large-scale resettlement plan in Rondônia province and resettled tens of thousands of immigrant families. Every year, nearly 200,000 immigrants have relocated to Rondônia in western Brazil from all over the country. Its main destination is Machadinho, northeast of the province. One of the most serious problems immigrants face is malaria. In 1985, there were 12,000 malaria cases in a migrant population of 5,000, with an average of more than two malaria cases per person per year. Except for the gold mines in the Amazon jungle, the highest prevalence here is in Brazil, where two-thirds of immigrants have acquired malaria.