ArticleASM case reports2026
Detection and genomic characterization of a travel-associated ECSA lineage chikungunya virus infection in Mexico.
Article in ASM case reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: In 2013, chikungunya virus (CHIKV), a re-emerging Case Summary: In November 2025, a healthy adult male traveling from Cuba arrived in Merida, Mexico, and shortly after presented febrile symptoms consistent with an arboviral infection. CHIKV infection was diagnosed by RT-qPCR. Though the infection was mild, the patient developed a rash on the abdomen and neck that persisted for up to a month, with further inflammation of the joints of the left leg. Phylogenetic analysis of the viral genome indicated placement within the ECSA lineage, clustering with other contemporaneous virus genomes sampled from Brazil that belong to a recently described clade II within the country, in which viral genomes from Cuba also cluster. Conclusion: We identify a travel-associated ECSA lineage CHIKV case in Mexico. This viral lineage has not previously been detected in the country. This finding highlights the risk for subsequent local transmission and is consistent with reports of the presence of this lineage in Cuba. Ten years since the last CHIKV epidemic in Mexico, strengthened surveillance is required to anticipate potential local outbreaks within the region.
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