Chikungunya in Guerrero, Mexico, 2019 and Evidence of Gross Underreporting in the Region.

Daniel Nunez-Avellaneda, Chandra Tangudu, Jacqueline Barrios-Palacios, Ma Isabel Salazar, Carlos Machain-Williams, Jonathan Cisneros-Pano, Lauren A McKeen, Bradley J Blitvich

Journal: The American journal of tropical medicine and hygiene 2022;105(5):1281-1284

PMID: 34460419

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Abstract

The local public health authorities reported nine cases of chikungunya in Mexico in 2019, none of which occurred in Guerrero, a coastal state in the southwest. To test the hypothesis that chikungunya is grossly underreported in Mexico, acute sera were collected from 639 febrile patients from low-income households in Guerrero in 2019 and serologically assayed for chikungunya virus (CHIKV). Analysis of the sera by plaque reduction neutralization test revealed that 181 (28.3%) patients were seropositive for CHIKV. To identify patients with acute CHIKV infections, a subset of serum samples were tested for CHIKV-specific IgM by ELISA. Serum samples from 21 of 189 (11.1%) patients were positive. These patients met the chikungunya case definition established by the WHO. In conclusion, we provide evidence that CHIKV remains an important public health problem in Mexico and that the true number of cases is severely underestimated.

Address: College of Veterinary Medicine, Iowa State University, Ames, Iowa.; National Institute of Medical Sciences and Nutrition Salvador Zubirán, Experimental Pathology Section, Ciudad de México, México.; Laboratorio de Virología e Inmunovirología, Depto. Microbiología Escuela Nacional de Ciencias Biológicas Instituto Politécnico Nacional, Ciudad de México, México.; Laboratorio de Arbovirologia, Centro de Investigaciones Regionales "Dr. Hideyo Noguchi," Universidad Autonoma de Yucatan, Merida, Yucatan, Mexico.; Laboratorio de Microbiología Médica, Universidad Autonoma de Guerrero, Chilpancingo, Guerrero, México.; College of Liberal Arts and Sciences, Iowa State University, Ames, Iowa.

DOI: 10.4269/ajtmh.21-0431

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MeSH Terms: Adolescent, Adult, Aged, Aged, 80 and over, Chikungunya Fever, Chikungunya virus, Child, Child, Preschool, Data Accuracy, Female, Humans, Immunoglobulin M, Infant, Infant, Newborn, Male, Mexico, Middle Aged, Prevalence, Public Health Surveillance, Seroepidemiologic Studies, Young Adult