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Division of Communicable Disease Control

Skip Navigation LinksChikungunya
 

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Chikungunya

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Chikungunya (pronounced chik-en-gun-ye) is an infectious disease with symptoms that typically include fever and severe joint pain. It is caused by the chikungunya virus, which is transmitted to people by mosquitoes. Chikungunya is transmitted by Aedes aegypti mosquitoes (also known as yellow fever mosquitoes) and Aedes albopictus mosquitoes (also known as Asian tiger mosquitoes). These mosquitoes bite primarily during the day. They are not native to California, but they have become established in some California counties. An Aedes mosquito can only transmit chikungunya virus after it bites a person who has this virus in their blood. Thus far in California, chikungunya infections have been documented only in people who were infected while traveling outside the United States. A person with chikungunya is not contagious.​​

Updates
  • CDPH Monthly Update on Number of Chikungunya Infections in California​  ā€“ Updated on the 1st Friday of the month
  • CDPH Map of Aedes aegypti and Aedes albopictus Mosquitoes in California by County (PDF)
  • CDPH List of Aedes aegypti and Aedes albopictus Mosquitoes in California by City or Census-Designated Place (PDF)
  • CDPH Interactive Map of Invasive Aedes Mosquitoes in California
Facts
  • CDPH Chikungunya fact sheet (PDF) ā€“ September 2016
  • Hoja de información sobre chikungunya (PDF) ā€“ February 2016
Resources
  • CDPH Aedes aegypti and Aedes albopictus Mosquitoes webpage
  • CDC About Chikungunya ā€“ U.S. Centers for Disease Control and Prevention​​
Mosquito & Disease Surveillance & Control Information
  • CDPH Guidance for Surveillance of & Response to Invasive Aedes Mosquitoes & Dengue, Chikungunya, & Zika in California (PDF)
  • CDPH Operational Checklist for Local Health Departments, Local Vector Control Districts, & California Department of Public Health In the Event of Local Dengue, Chikungunya, or Zika Transmission (PDF)​ ā€“ August 24, 2016​​​​
Information for Health Professionals
  • CDPH Information for Clinicians: Aedes aegypti & Aedes albopictus Mosquitoes in California & Reporting Patients with Suspected Dengue or Chikungunya to Public Health (PDF) ā€“ Updated January 2024
Page Last Updated : February 14, 2025
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