High prevalence of Zika virus infection in populations of Aedes aegypti from South-western Ecuador.

López-Rosero, Andrea; Sippy, Rachel; Stewart-Ibarra, Anna M; Ryan, Sadie J; Mordecai, Erin; Heras, Froilán; Beltrán, Efraín; Costales, Jaime A; Neira, Marco

López-Rosero, Andrea; Sippy, Rachel; Stewart-Ibarra, Anna M; Ryan, Sadie J; Mordecai, Erin; Heras, Froilán; Beltrán, Efraín; Costales, Jaime A; Neira, Marco.

Afiliação

López-Rosero A; Centro de Investigación para la Salud en América Latina (CISeAL), Facultad de Ciencias Exactas y Naturales, Pontificia Universidad Católica del Ecuador, Quito, Ecuador.
Sippy R; Institute for Global Health and Translational Science and Department of Medicine, SUNY Upstate Medical University, Syracuse, New York, United States of America.
Stewart-Ibarra AM; Institute for Global Health and Translational Science and Department of Medicine, SUNY Upstate Medical University, Syracuse, New York, United States of America.
Ryan SJ; Quantitative Disease Ecology and Conservation (QDEC) Laboratory, Department of Geography and Emerging Pathogens Institute, University of Florida, Gainesville, Florida, United States of America.
Mordecai E; Department of Biology, Stanford University, Stanford, California, United States of America.
Heras F; Institute for Global Health and Translational Science and Department of Medicine, SUNY Upstate Medical University, Syracuse, New York, United States of America.
Beltrán E; Universidad Técnica de Machala, Machala, El Oro, Ecuador.
Costales JA; Centro de Investigación para la Salud en América Latina (CISeAL), Facultad de Ciencias Exactas y Naturales, Pontificia Universidad Católica del Ecuador, Quito, Ecuador.
Neira M; Centro de Investigación para la Salud en América Latina (CISeAL), Facultad de Ciencias Exactas y Naturales, Pontificia Universidad Católica del Ecuador, Quito, Ecuador.

PLoS Negl Trop Dis ; 18(1): e0011908, 2024 Jan.

Article em En | MEDLINE | ID: mdl-38236943

ABSTRACT

ABSTRACT

We performed an arboviral survey in mosquitoes from four endemic Ecuadorian cities (Huaquillas, Machala, Portovelo and Zaruma) during the epidemic period 2016-2018. Collections were performed during the pre-rainy season (2016), peak transmission season (2017) and post-rainy season (2018). Ae. aegypti mosquitoes were pooled by date, location and sex. Pools were screened by RT-PCR for the presence of ZIKV RNA, and infection rates (IRs) per 1,000 specimens were calculated. A total of 2,592 pools (comprising 6,197 mosquitoes) were screened. Our results reveal high IRs in all cities and periods sampled. Overall IRs among female mosquitoes were highest in Machala (89.2), followed by Portovelo (66.4), Zaruma (47.4) and Huaquillas (41.9). Among male mosquitoes, overall IRs were highest in Machala (35.6), followed by Portovelo (33.1), Huaquillas (31.9) and Zaruma (27.9), suggesting that alternative transmission routes (vertical/venereal) can play important roles for ZIKV maintenance in the vector population of these areas. Additionally, we propose that the stabilization of ZIKV vertical transmission in the vector population could help explain the presence of high IRs in field-caught mosquitoes during inter-epidemic periods.

Assuntos

Aedes; Infecção por Zika virus; Zika virus; Animais; Masculino; Feminino; Humanos; Zika virus/genética; Equador/epidemiologia; Prevalência; Mosquitos Vetores

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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Aedes / Zika virus / Infecção por Zika virus Tipo de estudo: Prevalence_studies / Risk_factors_studies Limite: Animals / Female / Humans / Male País/Região como assunto: America do sul / Ecuador Idioma: En Revista: PLoS Negl Trop Dis Assunto da revista: MEDICINA TROPICAL Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Equador País de publicação: Estados Unidos

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