CONICET | Buscador de Institutos y Recursos Humanos

Know the population dynamics and seasonal-spatial distribution of the main Leishmania vectors populations is required to improve the prevention and control strategies. The aim of this work was to study the distribution of phlebotominae abundance in time and space in an area with records of vector transmission of Visceral Leishmaniasis and Tegumentary Leishmaniasis. For this, were selected 51 households peridomicile were selected using ?worst scenario? criterion. In each peridomicile we placed where one light trap REDILA-BL was set. The study was conducted during two consecutive nights during in the begining of the four seasons of year (early spring, early summer, early autumn and early winter). The environments were surveyed in each seasonalthe four samplings simultaneously with the entomological trapping. A total of 5110 individuals were captured. Lutzomyia longipalpis and Nyssomyia whitmani were the most abundant species captured in all seasons. The period of highest abundance ofto Lu. longipalpis was autumn, and its distributedion in the most urbanized areasspace was the yard of houses far away from the forest edge where more urban services are available. Contrary, Ny. whitmani occupied was observed mainly the less urbanized areas showingin periurban and more rural areas, during its peaks of abundance in spring and summer. Migonemyia migonei, Micropygomyia quinquefer, Ev. cortelezzii/sallesi, Brumptomyia brumpti, Pintomyia pessoai, Ny. neivai and Sciopemyia sordellii were captured in low numbers but showed similar seasonal-spatial variations to Ny. whitmani. Lu. longipalpis and Ny. whitmani occurrence and abundance variations were better explained by seasonality. We confirmed Leishmaniasis the vector persistence through the year in spatial patches of high abundance even during the less favourable season.

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