Lab. Ecologia Química de Insetos Vetores, Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais. Av. Presidente Antônio Carlos, Belo Horizonte, MG, Brazil.
PLoS One. 2012;7(7):e42125. doi: 10.1371/journal.pone.0042125. Epub 2012 Jul 25.
The use of vector surveillance tools for preventing dengue disease requires fine assessment of risk, in order to improve vector control activities. Nevertheless, the thresholds between vector detection and dengue fever occurrence are currently not well established. In Belo Horizonte (Minas Gerais, Brazil), dengue has been endemic for several years. From January 2007 to June 2008, the dengue vector Aedes (Stegomyia) aegypti was monitored by ovitrap, the sticky-trap MosquiTRAP™ and larval surveys in an study area in Belo Horizonte. Using a space-time scan for clusters detection implemented in SaTScan software, the vector presence recorded by the different monitoring methods was evaluated. Clusters of vectors and dengue fever were detected. It was verified that ovitrap and MosquiTRAP vector detection methods predicted dengue occurrence better than larval survey, both spatially and temporally. MosquiTRAP and ovitrap presented similar results of space-time intersections to dengue fever clusters. Nevertheless ovitrap clusters presented longer duration periods than MosquiTRAP ones, less acuratelly signalizing the dengue risk areas, since the detection of vector clusters during most of the study period was not necessarily correlated to dengue fever occurrence. It was verified that ovitrap clusters occurred more than 200 days (values ranged from 97.0±35.35 to 283.0±168.4 days) before dengue fever clusters, whereas MosquiTRAP clusters preceded dengue fever clusters by approximately 80 days (values ranged from 65.5±58.7 to 94.0±14. 3 days), the former showing to be more temporally precise. Thus, in the present cluster analysis study MosquiTRAP presented superior results for signaling dengue transmission risks both geographically and temporally. Since early detection is crucial for planning and deploying effective preventions, MosquiTRAP showed to be a reliable tool and this method provides groundwork for the development of even more precise tools.
利用病媒监测工具来预防登革热需要对风险进行精细评估，以改进病媒控制活动。然而，目前还没有很好地确定病媒检测与登革热发生之间的阈值。在巴西米纳斯吉拉斯州的贝洛奥里藏特，登革热已经流行了好几年。2007 年 1 月至 2008 年 6 月，在贝洛奥里藏特的一个研究区域，使用诱卵器、粘性诱捕器 MosquiTRAP 和幼虫调查监测登革热媒介埃及伊蚊。使用 SaTScan 软件中的时空扫描聚类检测方法，评估了不同监测方法记录的病媒存在情况。检测到了病媒和登革热的聚类。结果表明，诱卵器和 MosquiTRAP 病媒检测方法在空间和时间上都比幼虫调查更好地预测了登革热的发生。MosquiTRAP 和诱卵器与登革热聚类的时空交叉结果相似。然而，诱卵器聚类的持续时间比 MosquiTRAP 聚类长，因此，在研究期间，病媒聚类的检测并不一定与登革热的发生相关，因此，病媒聚类的检测不能准确地提示登革热风险区域。结果还表明，诱卵器聚类在登革热聚类之前发生的时间超过 200 天（范围从 97.0±35.35 到 283.0±168.4 天），而 MosquiTRAP 聚类在登革热聚类之前发生的时间约为 80 天（范围从 65.5±58.7 到 94.0±14.3 天），前者在时间上更为准确。因此，在本聚类分析研究中，MosquiTRAP 在地理和时间上都能更好地提示登革热传播风险。由于早期检测对于规划和部署有效的预防措施至关重要，因此 MosquiTRAP 显示出是一种可靠的工具，这种方法为开发更精确的工具奠定了基础。
