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Chikungunya Virus Infections Among Travelers–United States, 2010–2013

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  • Arboviral Diseases Branch, Centers for Disease Control and Prevention, Fort Collins, Colorado; Focus Diagnostics, Cypress, California; Viral and Rickettsial Disease Laboratory Branch, California Department of Public Health, Richmond, California
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Chikungunya virus is an emerging threat to the United States because humans are amplifying hosts and competent mosquito vectors are present in many regions of the country. We identified laboratory-confirmed chikungunya virus infections with diagnostic testing performed in the United States from 2010 through 2013. We described the epidemiology of these cases and determined which were reported to ArboNET. From 2010 through 2013, 115 laboratory-confirmed chikungunya virus infections were identified. Among 55 cases with known travel history, 53 (96%) reported travel to Asia and 2 (4%) to Africa. No locally-acquired infections were identified. Six patients had detectable viremia after returning to the United States. Only 21% of identified cases were reported to ArboNET, with a median of 72 days between illness onset and reporting. Given the risk of introduction into the United States, healthcare providers and public health officials should be educated about the recognition, diagnosis, and timely reporting of chikungunya virus disease cases.

Author Notes

* Address correspondence to Nicole P. Lindsey, Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, 3156 Rampart Road, Fort Collins, CO 80521. E-mail: nplindsey@cdc.gov

Disclosure: The findings and conclusions of this report are those of the authors and do not necessarily represent the views of the Centers for Disease Control and Prevention. H. Prince is a full-time employee of Focus Diagnostics, a provider of chikungunya virus diagnostic tests. All other authors have no conflicts.

Authors' addresses: Nicole P. Lindsey, Olga Kosoy, Janeen Laven, J. Erin Staples, and Marc Fischer, Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO, E-mails: nplindsey@cdc.gov, okosoy@cdc.gov, jlaveen@cdc.gov, estaples@cdc.gov, and mfischer@cdc.gov. Harry E. Prince, Focus Diagnostics, Cypress, CA, E-mail: hprince@focusdx.com. Sharon Messenger, Viral and Rickettsial Disease Laboratory Branch, California Department of Public Health, Richmond, CA, E-mail: Sharon.Messenger@cdph.ca.gov.

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