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Use of Aedes aegypti Oviposition Surveillance and a Geographic Information System for Planning Anti-Vectorial Measures

Daira N. Abán MoreyraInstituto de Investigación en Energía No Convencional, Departamento de Física, Universidad Nacional de Salta, Salta, Argentina;

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Paola M. CastilloInstituto de Investigación en Energía No Convencional, Departamento de Física, Universidad Nacional de Salta, Salta, Argentina;

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Andrés EscaladaInstituto de Investigaciones de Enfermedades Tropicales, Sede Regional Orán, Universidad Nacional de Salta, Orán, Argentina;

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Carolina MangudoInstituto de Investigación en Energía No Convencional, Departamento de Física, Universidad Nacional de Salta, Salta, Argentina;

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Griselda N. CopaInstituto de Investigaciones de Enfermedades Tropicales, Sede Regional Orán, Universidad Nacional de Salta, Orán, Argentina;
Cátedra de Química Biológica y Biología Molecular, Facultad de Ciencias Naturales, Universidad Nacional de Salta, Salta, Argentina;

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Raquel M. GleiserUniversidad Nacional de Córdoba- CONICET, Instituto Multidisciplinario de Biología Vegetal, Centro de Relevamiento y Evaluación de Recursos Agrícolas y Naturales, Córdoba, Argentina;
Facultad de Ciencias Exactas, Físicas y Naturales, Cátedra de Ecología, Universidad Nacional de Córdoba, Córdoba, Argentina

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Julio R. NasserCátedra de Química Biológica y Biología Molecular, Facultad de Ciencias Naturales, Universidad Nacional de Salta, Salta, Argentina;

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José F. GilInstituto de Investigación en Energía No Convencional, Departamento de Física, Universidad Nacional de Salta, Salta, Argentina;
Instituto de Investigaciones de Enfermedades Tropicales, Sede Regional Orán, Universidad Nacional de Salta, Orán, Argentina;
Cátedra de Química Biológica y Biología Molecular, Facultad de Ciencias Naturales, Universidad Nacional de Salta, Salta, Argentina;

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ABSTRACT.

Arboviruses transmitted by Aedes aegypti pose a threat to global public health. Because there are no vaccines or drugs available, the prevention of these diseases in Argentina is based on integrated vector control. In this work, the spatiotemporal dynamics of the vector distribution was analyzed by monitoring oviposition. This information allowed the planning of anti-vector interventions and the evaluation of their effect on the relative abundance of mosquito populations in San Ramón de la Nueva Orán. Observed data were compared with the eggs expected via a statistical model based on meteorological variables. The oviposition substrate preference of mosquito females was also evaluated, and the possible relationship between the relative abundance of the vector and sociodemographic and environmental variables (normalized difference vegetation index and normalized difference water index) was explored. A total of 4,193 eggs of Ae. aegypti were collected, and spatial clusters were detected for all months for which the presence of the mosquito was reported. The observed number of eggs was significantly less than the expected-corrected egg abundance. A significant correlation of oviposition activity was found with three sociodemographic variables, whereas no significant correlation was found with mean or median values of the environmental variables studied. This monitoring strategy made it possible to address the interventions and evaluate them, proposing them as good complementary tools for the control of Ae. aegypti in northern Argentina.

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Author Notes

Address correspondence to José F. Gil, Instituto de Investigación en Energía No Convencional (INENCO-CONICET), Departamento de Física, Universidad Nacional de Salta. Av. Bolivia 5150 - CP 4400, Salta, Argentina. E-mail: jgil@conicet.gov.ar

Authors’ addresses: Daira N. Abán Moreyra, Paola M. Castillo, and Carolina Mangudo, Instituto de Investigación en Energía No Convencional, Departamento de Física, Universidad Nacional de Salta, Salta, Argentina, E-mails: dnabanmoreyra@gmail.com, castillopaom@gmail.com, and cmangudo@conicet.gov.ar. Andrés Escalada, Instituto de Investigaciones de Enfermedades Tropicales, Sede Regional Orán, Universidad Nacional de Salta, Orán, Argentina, E-mail: andresestebanescalada@gmail.com. Griselda N. Copa, Instituto de Investigaciones de Enfermedades Tropicales, Sede Regional Orán, Universidad Nacional de Salta, Orán, Argentina, and Cátedra de Química Biológica y Biología Molecular, Facultad de Ciencias Naturales, Universidad Nacional de Salta, Salta, Argentina, E-mail: noemicopa@conicet.gov.ar. Raquel M. Gleiser, Universidad Nacional de Córdoba,- CONICET, Instituto Multidisciplinario de Biología Vegetal, Centro de Relevamiento y Evaluación de Recursos Agrícolas y Naturales, Córdoba, Argentina, and Facultad de Ciencias Exactas, Físicas y Naturales, Cátedra de Ecología, Universidad Nacional de Córdoba, Córdoba, Argentina, E-mail: raquel.gleiser@unc.edu.ar. Julio R. Nasser, Cátedra de Química Biológica y Biología Molecular, Facultad de Ciencias Naturales, Universidad Nacional de Salta, Salta, Argentina, E-mail: jrnasser@hotmail.com. José F. Gil, Instituto de Investigación en Energía No Convencional, Departamento de Física, Universidad Nacional de Salta, Salta, Argentina, Instituto de Investigaciones de Enfermedades Tropicales, Sede Regional Orán, Universidad Nacional de Salta, Orán, Argentina, and Cátedra de Química Biológica y Biología Molecular, Facultad de Ciencias Naturales, Universidad Nacional de Salta, Salta, Argentina, E-mail: jgil@conicet.gov.ar.

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