Abstract
Since chikungunya virus (CHIKV) was introduced into the Americas in 2013, its geographic distribution has rapidly expanded. Of 119 serum samples collected in 2014 from febrile patients in southern Mexico, 79% were positive for CHIKV or IgM against CHIKV. Sequencing results confirmed CHIKV strains closely related to Caribbean isolates.
Highlights
Since chikungunya virus (CHIKV) was introduced into the Americas in 2013, its geographic distribution has rapidly expanded
In October 2014, physicians in Chiapas State, Mexico, noticed large numbers of patients reporting febrile illness accompanied by rash and an unusual arthralgia, and chikungunya fever was suspected
Because both mosquito species are found in Chiapas [14], adaptation of the CHIKV strain circulating in Mexico to A. albopictus mosquitoes could place temperate regions of the eastern United States and millions of naive persons at risk for infection
Summary
Since chikungunya virus (CHIKV) was introduced into the Americas in 2013, its geographic distribution has rapidly expanded. We report a chikungunya fever outbreak in southern Mexico, involving CHIKV of Asian lineage as the etiologic agent. In late 2013, an outbreak of chikungunya fever caused by an Asian lineage strain began in the Caribbean island of St. Martin [2,3].
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