BACKGROUND The number of malaria cases in Roraima nearly tripled from 2016 to 2018. The capital, Boa Vista, considered a low-risk area for malaria transmission, reported an increasing number of autochthonous and imported cases. OBJECTIVES This study describes a spatial analysis on malaria cases in an urban region of Boa Vista, which sought to identify the autochthonous and imported cases and associated them with Anopheles habitats and the potential risk of local transmission. METHODS In a cross-sectional study at the Polyclinic Cosme e Silva, 520 individuals were interviewed and diagnosed with malaria by microscopic examination. Using a global positional system, the locations of malaria cases by type and origin and the breeding sites of anopheline vectors were mapped and the risk of malaria transmission was evaluated by spatial point pattern analysis. FINDINGS Malaria was detected in 57.5% of the individuals and there was a disproportionate number of imported cases (90.6%) linked to Brazilian coming from gold mining sites in Venezuela and Guyana. MAIN CONCLUSIONS The increase in imported malaria cases circulating in the west region of Boa Vista, where there are positive breeding sites for the main vectors, may represent a potential condition for increased autochthonous malaria transmission in this space.

中文翻译：

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金矿工在罗赖马（Roraima）进口疟疾的影响：表征博阿维斯塔（Boa Vista）城市地区本地和进口疟疾的空间动态。

背景技术从2016年到2018年，罗赖马州的疟疾病例数几乎增加了两倍。首都博阿维斯塔（Boa Vista）被认为是疟疾传播的低风险地区，其自发性病例和外来病例均在增加。目的本研究描述了博阿维斯塔（Boa Vista）市区的疟疾病例的空间分析，该研究旨在确定本地和外来病例，并将其与按蚊栖息地以及当地传播的潜在风险相关联。方法在Polyclinic Cosme e Silva的一项横断面研究中，对520个人进行了访谈，并通过显微镜检查诊断为疟疾。使用全球定位系统，绘制了按类型和来源划分的疟疾病例位置和按蚊媒介的繁殖地点，并通过空间点模式分析评估了疟疾传播的风险。调查结果发现，在57.5％的人中发现了疟疾，与委内瑞拉和圭亚那的金矿开采场有关的与巴西有关的进口病例数量不成比例（90.6％）。主要结论在博阿维斯塔（Boa Vista）西部地区流行的进口疟疾病例增加，那里是主要病媒的阳性繁殖地点，这可能是该地区自发性疟疾传播增加的潜在条件。