Seroprevalence of arboviruses in Ecuador: Implications for improved surveillance

Ernesto Gutiérrez-Vera , Leandro Patiño, Martha Castillo-Segovia, Víctor Mora-Valencia, Julio Montesdeoca-Agurto, Mary Regato-Arrata , .

DOI: https://doi.org/10.7705/biomedica.5623
Keywords: Arbovirus, yellow fever virus, West Nile virus, dengue virus, encephalitis virus, Venezuelan equine, encephalitis virus, Eastern equine
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Abstract

Introduction: Arthropod-borne viruses (arboviruses) cause morbidity and mortality in humans and domestic animals worldwide. The percentage of population immunity or susceptibility to these viruses in Ecuador is unknown.
Objectives: To investigate the proportion of Ecuadorian populations with IgG antibodies (Abs) (past exposure/immunity) and IgM Abs (current exposure) against flaviviruses and alphaviruses and to study the activity of these viruses in Ecuador.
Materials and methods: During 2009-2011, we conducted a serosurvey for selected arboviruses in humans (n=1,842), equines (n=149), and sentinel hamsters (n=84) at two coastal locations and one in the Amazon basin (Eastern Ecuador) using enzyme-linked immunosorbent assay and hemagglutination inhibition test.
Results: From 20.63% to 63.61% of humans showed IgG-antibodies for the flaviviruses: Dengue virus (DENV), yellow fever virus (YFV) Saint Louis encephalitis virus, and West Nile virus (WNV); from 4.67% to 8.63% showed IgG-Abs for the alphaviruses: Venezuelan equine encephalitis virus, eastern equine encephalitis virus, and western equine encephalitis virus. IgM-Abs were found for DENV and WNV. Equines and hamsters showed antibodies to alphaviruses in all locations; two hamsters seroconverted to YFV in the Amazonia.
Conclusions: The results show a YFV vaccination history and suggest the activity of arboviruses not included in the current surveillance scheme. Enhanced arbovirus and mosquito surveillance, as well as continued YFV vaccination and evaluation of its coverage/effectiveness, are recommended.

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  • Ernesto Gutiérrez-Vera Departamento de Virología, Instituto Nacional de Investigación en Salud Pública “Dr. Leopoldo Izquieta Pérez”, Guayaquil, Ecuador
  • Leandro Patiño Departamento de Virología, Instituto Nacional de Investigación en Salud Pública “Dr. Leopoldo Izquieta Pérez”, Guayaquil, Ecuador; Dirección Técnica de Investigación, Desarrollo e Innovación, Instituto Nacional de Investigación en Salud Pública “Dr. Leopoldo Izquieta Pérez”, Guayaquil, Ecuador
  • Martha Castillo-Segovia Departamento de Virología, Instituto Nacional de Investigación en Salud Pública “Dr. Leopoldo Izquieta Pérez”, Guayaquil, Ecuador; Escuela de Medicina, Universidad de Especialidades Espíritu Santo, Samborondón, Ecuador
  • Víctor Mora-Valencia Departamento de Virología, Instituto Nacional de Investigación en Salud Pública “Dr. Leopoldo Izquieta Pérez”, Guayaquil, Ecuador; Laboratorio Clínico, Hospital General Guasmo Sur, Guayaquil, Ecuador
  • Julio Montesdeoca-Agurto Departamento de Virología, Instituto Nacional de Investigación en Salud Pública “Dr. Leopoldo Izquieta Pérez”, Guayaquil, Ecuado
  • Mary Regato-Arrata Departamento de Virología, Instituto Nacional de Investigación en Salud Pública “Dr. Leopoldo Izquieta Pérez”, Guayaquil, Ecuador; Centro de Referencia Nacional de Virus Exantemáticos, Gastroentéricos y Transmitidos por vectores, Instituto Nacional de Investigación en Salud Pública “Dr. Leopoldo Izquieta Pérez”, Guayaquil, Ecuador

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How to Cite
1.
Gutiérrez-Vera E, Patiño L, Castillo-Segovia M, Mora-Valencia V, Montesdeoca-Agurto J, Regato-Arrata M. Seroprevalence of arboviruses in Ecuador: Implications for improved surveillance. biomedica [Internet]. 2021 Jun. 29 [cited 2024 May 17];41(2):247-59. Available from: https://revistabiomedica.org/index.php/biomedica/article/view/5623

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Published
2021-06-29
Issue
Vol. 41 No. 2 (2021)
Section
Original articles

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