Trece registros nuevos de Lutzomyia (Diptera: Psychodidae) para el departamento de Vichada, Orinoquia Colombiana / Thirteen new records of Lutzomyia (Diptera: Psychodidae) for the department of Vichada, Colombian Orinoquia

Se informa el primer hallazgo de Lutzomyia trinidadensis (Newstead, 1922), L. bettinii Feliciangeli, Ramírez-Pérez & Ramírez, 1988, L. flaviscutellata (Mangabeira, 1942), L. yuilli Young & Porter, 1972, L. saulensis (Floch & Abonnenc, 1944), L. runoides (Fairchild & Hertig, 1953), L. ayrozai (Barretto & Coutinho, 1940), L. claustrei Abonnenc, Leger & Fauran, 1979, L. walkeri (Newstead, 1914), L. preclara Young & Arias, 1984, L. (geniculata) sp., L. (squamiventris) sp., y L. (Evandromyia) sp., en el departamento de Vichada, Colombia. También se confirma la presencia de L. antunesi (Coutinho, 1939) y L. aragaoi (Costa Lima, 1932) en este departamento. Los flebotomíneos fueron recolectados en los municipios de Puerto Carreño, Cumaribo, y La Primavera, con trampas de luz tipo CDC, trampa Shannon y atrayente humano, y mediante búsqueda activa en lugares de reposo. Se discute la importancia epidemiológica de estas especies de flebotomíneos en relación con la leishmaniosis cutánea.

Lutzomyia trinidadensis (Newstead, 1922), L. bettinii Feliciangeli, Ramírez-Pérez & Ramírez, 1988, L. flaviscutellata (Mangabeira, 1942), L. yuilli Young & Porter, 1972, L. saulensis (Floch & Abonnenc, 1944), L. runoides (Fairchild & Hertig, 1953), L. ayrozai (Barretto & Coutinho, 1940), L. claustrei Abonnenc, Leger & Fauran, 1979, L. walkeri (Newstead, 1914), L. preclara Young & Arias, 1984, L. (geniculata) sp., L. (squamiventris) sp., and L. (Evandromyia) sp., are recorded for the first time in the department of Vichada, Colombia. In addition, the presence of L. antunesi (Coutinho, 1939) and L. aragaoi (Costa Lima, 1932) in this department is confirmed. Sand flies were collected in the municipalities of Puerto Carreño, Cumaribo, and La Primavera, using CDC light traps, Shannon trap, and human bait, and by active search in resting places. The epidemiological importance of these sand fly species is discussed in relation with the cutaneous leishmaniasis.

Primer informe de Lutzomyia França en el departamento de Guainía, Amazonia Colombiana, y de Brumptomyia mesai Sherlock (Diptera: Psychodidae) en el Litoral Caribe Colombiano / First Report of Lutzomyia França in the department of Guainía, Amazonian Colombia, and of Brumptomyia mesai Sherlock (Diptera: Psychodidae) in the Colombian Caribbean Coast

Se registra por primera vez para el Departamento de Guainía, Colombia, la presencia del género Lutzomyia França de reconocida importancia médica. Los flebotomíneos se recolectaron mientras intentaban picar al humano en los alrededores del casco urbano del municipio de Inírida. Se identificaron taxonómicamente tres especies de Lutzomyia, incluidas L. davisi (Root), L. olmeca bicolor Fairchild & Theodor, y L. antunesi (Coutinho). Adicionalmente, Brumptomyia mesai Sherlock es citada por primera vez en el litoral Caribe Colombiano a partir de ejemplares colectados con una trampa de luz CDC modificada en la Reserva Forestal Protectora Serranía de Coraza y Montes de María, Departamento de Sucre.

This is the first record of the presence of the medically important genus Lutzomyia França in the Department of Guainía, Colombia. Sand flies were collected biting humans in the surroundings of the urban area of the Municipality of Inírida. Three Lutzomyia species were taxonomically identified as L. davisi (Root), L. olmeca bicolor Fairchild & Theodor, and L. antunesi (Coutinho). Additionally, Brumptomyia mesai Sherlock is cited for the first time in the Caribbean Coast of Colombia based on specimens collected with a modified CDC light trap in the Reserva Forestal Protectora Serranía de Coraza y Montes de María, Department of Sucre.

[Evaluating two pyrethroids in dengue vector control in Putumayo, Colombia]. / Evaluación de dos Piretroides en el Control del Vector del Dengue en Putumayo, Colombia.

OBJECTIVE: Evaluating the efficacy of two pyrethroid insecticides on Aedes aegypti, thereby providing useful information for decision-making in controlling dengue. METHODS: The effect on A. aegypti of ultra low volume (ULV) highcis-Permethrin (Depe) and ss-cypermethrin pyrethroids in a smoke-generating formulation (Bolate) was evaluated in 16 blocks in the town of Puerto Leguizamo, Putumayo, between July and December 2004. Their efficacy was measured by the mortality of mosquitoes kept in sentinel cages set in different parts of the households and weekly follow-up of the number of mosquitoes and the presence of larvae. RESULTS: There was an 80% reduction in mosquito density on the day after insecticide treatment for both insecticides. Mosquitoes became displaced from inside the houses to outside them after the insecticides had been applied. In spite of the insecticides' immediate impact, a maintained reduction in mosquito density throughout the 5 weeks' evaluation was not observed, probably due to the emergence of adults from deposits which had not been treated. CONCLUSION: These insecticides showed higher than 80% efficacy in reducing A. aegypti mosquito density and they constitute an alternative for dengue control.

Evaluación de dos Piretroides en el Control del Vector del Dengue en Putumayo, Colombia / Evaluating two pyrethroids in dengue vector control in Putumayo, Colombia

Objetivo: Evaluar la eficacia de dos insecticidas piretroides sobre Aedes aegypti, información útil en la toma de decisiones para el control de dengue. Métodos: Se evaluaron los piretroides highcis-Permetrina (Depeâ) en aplicación en ultra bajo volumen (ULV) y ß-cipermetrina en un pote fumígeno (Bolateâ) sobre A. aegypti en 16 manzanas de la cabecera municipal de Puerto Leguízamo, Putumayo, entre Julio y Diciembre del 2004. El efecto inmediato se midió en jaulas centinela colocadas en diferentes sitios de las viviendas y se realizó un seguimiento semanal evaluando las densidades de adultos y presencia de larvas. Resultados: La reducción de las densidades de adultos el día posterior a la aplicación de los insecticidas fue superior al 80 por ciento con los dos insecticidas. Se encontró un desplazamiento de los mosquitos del interior al exterior de las viviendas después de la aplicación de los insecticidas. A pesar del impacto inmediato de los insecticidas, no se observó una disminución sostenida de la densidad de adultos a lo largo de las 5 semanas de evaluación post-tratamiento, debido probablemente a la emergencia de adultos de los criaderos, los cuales no fueron tratados. Conclusión: Los insecticidas mostraron una eficacia superior al 80 por ciento en reducción de las densidades de A.aegypti y se constituyen en una alternativa para el control de Dengue.

Objective: Evaluating the efficacy of two pyrethroid insecticides on Aedes aegypti, thereby providing useful information for decision-making in controlling dengue. Methods: The effect on A. aegypti of ultra low volume (ULV) highcis-Permethrin (Depe) and ß-cypermethrin pyrethroids in a smoke-generating formulation (Bolate) was evaluated in 16 blocks in the town of Puerto Leguizamo, Putumayo, between July and December 2004. Their efficacy was measured by the mortality of mosquitoes kept in sentinel cages set in different parts of the households and weekly follow-up of the number of mosquitoes and the presence of larvae. Results: There was an 80 percent reduction in mosquito density on the day after insecticide treatment for both insecticides. Mosquitoes became displaced from inside the houses to outside them after the insecticides had been applied. In spite of the insecticides' immediate impact, a maintained reduction in mosquito density throughout the 5 weeks' evaluation was not observed, probably due to the emergence of adults from deposits which had not been treated. Conclusion These insecticides showed higher than 80 percent efficacy in reducing A. aegypti mosquito density and they constitute an alternative for dengue control.

[First Report of Lutzomyia França in the department of Guainía, Amazonian Colombia, and of Brumptomyia mesai Sherlock (Diptera: Psychodidae) in the Colombian Caribbean Coast]. / Primer informe de Lutzomyia França en el departamento de Guainía, Amazonia Colombiana, y de Brumptomyia mesai Sherlock (Diptera: Psychodidae) en el Litoral Caribe Colombiano.

This is the first record of the presence of the medically important genus Lutzomyia França in the Department of Guainía, Colombia. Sand flies were collected biting humans in the surroundings of the urban area of the Municipality of Inírida. Three Lutzomyia species were taxonomically identified as L. davisi (Root), L. olmeca bicolor Fairchild & Theodor, and L. antunesi (Coutinho). Additionally, Brumptomyia mesai Sherlock is cited for the first time in the Caribbean Coast of Colombia based on specimens collected with a modified CDC light trap in the Reserva Forestal Protectora Serranía de Coraza y Montes de María, Department of Sucre.