Towards a Casa Segura: a consumer product study of the effect of insecticide-treated curtains on Aedes aegypti and dengue virus infections in the home

• Published in: The American journal of tropical medicine and hygiene Vol. 89; no. 2; pp. 385 - 397
• Main Authors: Loroño-Pino, María Alba, García-Rejón, Julián E, Machain-Williams, Carlos, Gomez-Carro, Salvador, Nuñez-Ayala, Guadalupe, Nájera-Vázquez, Maria del Rosario, Losoya, Arturo, Aguilar, Lyla, Saavedra-Rodriguez, Karla, Lozano-Fuentes, Saul, Beaty, Meaghan K, Black, 4th, William C, Keefe, Thomas J, Eisen, Lars, Beaty, Barry J
• Format: Journal Article
• Language: English
• Published: United States The American Society of Tropical Medicine and Hygiene 01.08.2013
• Subjects: Aedes - drug effects; Aedes - genetics; Aedes - virology; Aedes aegypti; Animals; Dengue - epidemiology; Dengue - prevention & control; Dengue virus; Dengue Virus - physiology; Female; Housing; Insect Vectors - drug effects; Insect Vectors - genetics; Insect Vectors - virology; Insecticide Resistance - genetics; Insecticides - chemistry; Insecticides - pharmacology; Mexico - epidemiology; Mosquito Control - methods; Nitriles - chemistry; Nitriles - pharmacology; Pyrethrins - chemistry; Pyrethrins - pharmacology; Textiles; Mexico; Mexico, Yucatan, Merida
• ISSN: 0002-9637; 1476-1645
• DOI: 10.4269/ajtmh.12-0772

The home, or domicile, is the principal environment for transmission of dengue virus (DENV) between humans and mosquito vectors. Community-wide distribution of insecticide-treated curtains (ITCs), mimicking vector control program-driven interventions, has shown promise to reduce DENV infections. We conducted a Casa Segura consumer product intervention study in Mérida, Mexico to determine the potential to reduce intradomicillary DENV transmission through ITC use in individual homes. Dengue virus infections in mosquitoes and in humans were reduced in homes with ITCs in one of two study subareas. Overall, ITCs reduced intradomicillary DENV transmission; ITC homes were significantly less likely to experience multiple DENV infections in humans than NTC homes. Dengue virus-infected Aedes aegypti females were reduced within the ITC homes where curtain use was highest. Some homes yielded up to nine infected Ae. aegypti females. This study provides insights regarding best practices for Casa Segura interventions to protect homes from intradomicillary DENV transmission.