Distribution of Phlebotominae in primary forest-crop interface, Salta, Argentina

QUINTANA MG; SALOMON OD; LIZARRALDE DE GROSSO, MERCEDES

JOURNAL OF MEDICAL ENTOMOLOGY

ENTOMOLOGICAL SOC AMER

Año: 2010 vol. 47 p. 1003 - 1010

0022-2585

Disordered urbanization and deforestation are the main activities proposed as causal factors of re-emergence of American cutaneous leishmaniasis caused by Leishmania braziliensis. The purpose of this work was to investigate, in the hyperendemic area of Argentina, the distribution of Phlebotomine sand ßies at the modiÞed primary vegetation-crop interface, as one of the potential sites where the effects of changing landscape on sand ßy populations may be manifested. Twenty samplings were made between June 2004 and August 2005. The traps to catch sand ßies were set on two consecutive nights every month (except in 5 mo, where it became every 15 d). The relationship between sand ßy abundance and meteorological and landscape variables was analyzed using nonmetric multidimensional scaling and KendallÕs correlation coefÞcients. Lutzomyia neivai (Pinto) was the most abundant species, followed by Lutzomyia migonei (Franc¸ a), Lutzomyia cortelezzii (Bre` thes),Leishmania braziliensis. The purpose of this work was to investigate, in the hyperendemic area of Argentina, the distribution of Phlebotomine sand ßies at the modiÞed primary vegetation-crop interface, as one of the potential sites where the effects of changing landscape on sand ßy populations may be manifested. Twenty samplings were made between June 2004 and August 2005. The traps to catch sand ßies were set on two consecutive nights every month (except in 5 mo, where it became every 15 d). The relationship between sand ßy abundance and meteorological and landscape variables was analyzed using nonmetric multidimensional scaling and KendallÕs correlation coefÞcients. Lutzomyia neivai (Pinto) was the most abundant species, followed by Lutzomyia migonei (Franc¸ a), Lutzomyia cortelezzii (Bre` thes),Lutzomyia neivai (Pinto) was the most abundant species, followed by Lutzomyia migonei (Franc¸ a), Lutzomyia cortelezzii (Bre` thes),Lutzomyia migonei (Franc¸ a), Lutzomyia cortelezzii (Bre` thes), Lutzomyia shannoni (Dyar), and Lutzomyia punctigeniculata (Floch and Abonnenc). Traps located close to modiÞed areas collected the greatest numbers of sand ßies, whereas traps located in the least modiÞed area (adjacent to the primary vegetation) collected the fewest. There was a strong negative correlation between the abundance of sand ßies and precipitation. This study shows that even small modiÞcations in the landscape led to an increase in sand ßy abundance, mainly Lu. neivai, a Leishmania braziliensis vector. This underscores the need for recommendations about the risk of American cutaneous leishmaniasis before any environmental intervention is done in an endemic area, as well as for the monitoring of sand ßy population dynamics at the site of intervention, before, during, and after the process.(Dyar), and Lutzomyia punctigeniculata (Floch and Abonnenc). Traps located close to modiÞed areas collected the greatest numbers of sand ßies, whereas traps located in the least modiÞed area (adjacent to the primary vegetation) collected the fewest. There was a strong negative correlation between the abundance of sand ßies and precipitation. This study shows that even small modiÞcations in the landscape led to an increase in sand ßy abundance, mainly Lu. neivai, a Leishmania braziliensis vector. This underscores the need for recommendations about the risk of American cutaneous leishmaniasis before any environmental intervention is done in an endemic area, as well as for the monitoring of sand ßy population dynamics at the site of intervention, before, during, and after the process.Lu. neivai, a Leishmania braziliensis vector. This underscores the need for recommendations about the risk of American cutaneous leishmaniasis before any environmental intervention is done in an endemic area, as well as for the monitoring of sand ßy population dynamics at the site of intervention, before, during, and after the process.vector. This underscores the need for recommendations about the risk of American cutaneous leishmaniasis before any environmental intervention is done in an endemic area, as well as for the monitoring of sand ßy population dynamics at the site of intervention, before, during, and after the process.