Administración Nacional de Laboratorios e Institutos de Salud, Centro Nacional de Diagnóstico e Investigaciones Endemo-epidemicas, Buenos Aires, Argentina.
Mem Inst Oswaldo Cruz. 2012 Sep;107(6):767-71. doi: 10.1590/s0074-02762012000600010.
The distribution of Lutzomyia longipalpis is heterogeneous with a pattern of high abundance areas (HAAs) embedded in a matrix of low abundance areas (LAAs). The objective of this study was to describe the variability in the abundance of Lu. longipalpis at two different spatial levels and to analyse the relationship between the abundance and multiple environmental variables. Of the environmental variables analysed in each household, the condition that best explained the differences in vector abundance between HAA-LAA was the variable "land_grass", with greater average values in the peridomestic environments within the LAA, and the variables "#sp tree", "#pots" and "dist_water" that were higher in the HAA. Of the environmental variables analysed in the patches, the variable "unpaved_streets" was higher in the LAAs and the variable "prop_inf_dogs" was higher in the HAAs. An understanding of the main environmental variables that influence the vector distribution could contribute to the development of strategies for the prevention and control of visceral leishmaniasis (VL). This is the first work in which environmental variables are analysed at the micro-scale in urban areas at the southern edge of the current range of Lu. longipalpis. Our results represent a significant contribution to the understanding of the abundance of the vector in the peridomestic habitats of the region.
长刺伊蚊的分布不均匀，存在高密度区（HAA）和低密度区（LAA）镶嵌的格局。本研究的目的是描述在两个不同空间水平上长刺伊蚊丰度的可变性，并分析丰度与多个环境变量之间的关系。在每个家庭中分析的环境变量中，“land_grass”变量最能解释 HAA-LAA 之间媒介丰度差异，在 LAA 内的家庭环境中，该变量的平均值更高，而在 HAA 中，“#sp tree”、“#pots”和“dist_water”变量更高。在斑块中分析的环境变量中，“unpaved_streets”在 LAA 中更高，而“prop_inf_dogs”在 HAA 中更高。了解影响媒介分布的主要环境变量可能有助于制定预防和控制内脏利什曼病（VL）的策略。这是首次在长刺伊蚊当前分布范围南端的城市地区微观尺度上分析环境变量的工作。我们的研究结果对理解该地区家庭环境中媒介丰度具有重要意义。
