A field study to evaluate the performance of two modified CDC light traps for collecting sandflies compared with the traditional CDC trap light.

GOULD IGNACIO; FERNÁNDEZ, MARÍA SOLEDAD; PÉREZ ADRIANA; SALOMON OSCAR DANIEL

Puerto Iguazú

Simposio; VIII International Symposium on Phlebotomine Sandflies; 2014

In recent years numerous surveys have been conducted in the Argentina to study the distribution and dispersal of sandflies due to an increment in the number of cases of visceral and tegumentary leishmaniasis. The aim of this work was to compare two local developed types of light traps for sandflies with the traditional CDC trap light (CDC). Both news traps are a modified CDC trap light with a ring of leds, one of white light (WL) and the other of black light (BL). Traps were compared according to the occurrence and the number of individuals of sandflies, Lutzomyia longipalpis, the main Leishmania infantum vector and Nyssomyia whitmani, a L. braziliensis vector. In order to test the traps 21 sample points were choosing in forest, rural and urban scenarios in the city of Puerto Iguazú and around it. A Latin Square design was used for the evaluation of the type of trap. At each site, the three types of traps were randomly assigned during three consecutive nights. The variation in the occurrence and numbers of individuals by species, according to the type of trap, the sex and their interaction was evaluated using Generalized Linear Mixed Models. For Lu. longipalpis, 300 individuals captured in 9 sites (urban and rural environmental) and for Ny. whitmani 1443 individuals captured in 11 sites (urban, rural and forest environmental) were included in the analysis. For both species, no differences were found for the occurrence between the three types of trap for both sex (p>0.05 in all cases). For Lu. longipalpis, for both sexes, the number of captured individuals didn´t differ between BL and CDC trap, neither between CDC and WL trap, but was higher for BL compared to WL trap (p=0.022). For Ny. whitmani we found no differences between types of trap for females (p>0.05), but for males we found that the traditional CDC and the WL traps captured more individuals that the BL traps (p