Comparative Field Trial of Alternative Vector Control Strategies for Non-Domiciliated Triatoma dimidiata

Jhibran Ferral Laboratorio de Parasitología, Centro de Investigaciones Regionales Dr. Hideyo Noguchi, Universidad Autónoma de Yucatán, Mérida, Yucatan, Mexico; Departamento de Control de Vectores, Servicios de Salud de Yucatán, Mérida, Yucatan, Mexico; Department of Tropical Medicine, Tulane University, School of Public Health and Tropical Medicine, New Orleans, Louisanna

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Leysi Chavez-Nuñez Laboratorio de Parasitología, Centro de Investigaciones Regionales Dr. Hideyo Noguchi, Universidad Autónoma de Yucatán, Mérida, Yucatan, Mexico; Departamento de Control de Vectores, Servicios de Salud de Yucatán, Mérida, Yucatan, Mexico; Department of Tropical Medicine, Tulane University, School of Public Health and Tropical Medicine, New Orleans, Louisanna

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Maria Euan-Garcia Laboratorio de Parasitología, Centro de Investigaciones Regionales Dr. Hideyo Noguchi, Universidad Autónoma de Yucatán, Mérida, Yucatan, Mexico; Departamento de Control de Vectores, Servicios de Salud de Yucatán, Mérida, Yucatan, Mexico; Department of Tropical Medicine, Tulane University, School of Public Health and Tropical Medicine, New Orleans, Louisanna

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Maria Jesus Ramirez-Sierra Laboratorio de Parasitología, Centro de Investigaciones Regionales Dr. Hideyo Noguchi, Universidad Autónoma de Yucatán, Mérida, Yucatan, Mexico; Departamento de Control de Vectores, Servicios de Salud de Yucatán, Mérida, Yucatan, Mexico; Department of Tropical Medicine, Tulane University, School of Public Health and Tropical Medicine, New Orleans, Louisanna

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M. Rosario Najera-Vazquez Laboratorio de Parasitología, Centro de Investigaciones Regionales Dr. Hideyo Noguchi, Universidad Autónoma de Yucatán, Mérida, Yucatan, Mexico; Departamento de Control de Vectores, Servicios de Salud de Yucatán, Mérida, Yucatan, Mexico; Department of Tropical Medicine, Tulane University, School of Public Health and Tropical Medicine, New Orleans, Louisanna

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Eric Dumonteil Laboratorio de Parasitología, Centro de Investigaciones Regionales Dr. Hideyo Noguchi, Universidad Autónoma de Yucatán, Mérida, Yucatan, Mexico; Departamento de Control de Vectores, Servicios de Salud de Yucatán, Mérida, Yucatan, Mexico; Department of Tropical Medicine, Tulane University, School of Public Health and Tropical Medicine, New Orleans, Louisanna

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Chagas disease is a major vector-borne disease, and regional initiatives based on insecticide spraying have successfully controlled domiciliated vectors in many regions. Non-domiciliated vectors remain responsible for a significant transmission risk, and their control is a challenge. We performed a proof-of-concept field trial to test alternative strategies in rural Yucatan, Mexico. Follow-up of house infestation for two seasons following the interventions confirmed that insecticide spraying should be performed annually for the effective control of Triatoma dimidiata; however, it also confirmed that insect screens or long-lasting impregnated curtains may represent good alternative strategies for the sustained control of these vectors. Ecosystemic peridomicile management would be an excellent complementary strategy to improve the cost-effectiveness of interventions. Because these strategies would also be effective against other vector-borne diseases, such as malaria or dengue, they could be integrated within a multi-disease control program.

Author Notes

*Address correspondence to Eric Dumonteil, Laboratorio de Parasitología, Centro de Investigaciones Regionales Dr. Hideyo Noguchi, Universidad Autónoma de Yucatán, Ave. Itzaes #490 × 59, 97000 Mérida, Yucatán, Mexico. E-mail: edumonte@tulane.edu

Financial Support: The study was funded by grant no. 2005-1-13790 from CONACYT-SALUD to ED.

Authors' addresses: Jhibran Ferral, Leysi Chavez-Nuñez, Maria Euan-Garcia, and Maria Jesus Ramirez-Sierra, Laboratorio de Parasitología, Centro de Investigaciones Regionales Dr. Hideyo Noguchi, Universidad Autónoma de Yucatán, Mérida, Yucatan, Mexico, E-mail: oliver@uady.mx. M. Rosario Najera-Vazquez, Departamento de Control de Vectores, Servicios de Salud de Yucatán, Mérida, Yucatan, Mexico, E-mail: dengueyucatan@salud.gob.mx. Eric Dumonteil, Laboratorio de Parasitología, Centro de Investigaciones Regionales Dr. Hideyo Noguchi, Universidad Autónoma de Yucatán, Mérida, Yucatan, Mexico and Department of Tropical Medicine, School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA, E-mail: edumonte@tulane.edu.

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