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BACKGROUND   Visceral leishmaniasis (VL) is an endemic disease in northeastern Argentina including the Corrientes province, where the presence of the vector and canine cases of VL were recently confirmed in December 2008.    OBJECTIVES   The objective of this study was to assess the modelling of micro- and macro-habitat variables to evaluate the urban environmental suitability for the spatial distribution of  Lutzomyia longipalpis  presence and abundance in an urban scenario.    METHODS   Sampling of 45 sites distributed throughout Corrientes city (Argentina) was carried out using REDILA-BL minilight traps in December 2013. The sampled specimens were identified according to methods described by Galati (2003). The analysis of variables derived from the processing of satellite images (macro-habitat variables) and from the entomological sampling and surveys (micro-habitat variables) was performed using the statistical software  R.  Three generalised linear models were constructed composed of micro- and macro-habitat variables to explain the spatial distribution of the abundance of  Lu. longipalpis  and one composed of micro-habitat variables to explain the occurrence of the vector.    FINDINGS   A total of 609 phlebotominae belonging to five species were collected, of which 56% were  Lu. longipalpis . In addition, the presence of  Nyssomyia neivai  and  Migonemya migonei , which are vectors of tegumentary leishmaniasis, were also documented and represented 34.81% and 6.74% of the collections, respectively. The explanatory variable normalised difference vegetation index (NDVI) described the abundance distribution, whereas the presence of farmyard animals was important for explaining both the abundance and the occurrence of the vector.    MAIN CONCLUSIONS   The results contribute to the identification of variables that can be used to establish priority areas for entomological surveillance and provide an efficient transfer tool for the control and prevention of vector-borne diseases.

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Environmental suitability for Lutzomyia longipalpis in a subtropical city with a recently established visceral leishmaniasis transmission cycle, Argentina