Chikungunya
Chikungunya is a viral infection caused by the chikungunya virus (CHIKV), an alphavirus which is spread through mosquito bites. The mosquitoes that transmit chikungunya bite during the day, from sunrise to sunset, especially at dawn and dusk. They breed in natural and man-made containers (for example flowerpots and old tyres) and these are a risk factor for transmission if left around human habitation.
Chikungunya was first isolated after an outbreak in Tanzania in the 1950s. It now occurs mainly in tropical and subtropical regions of the world but has also been found in parts of Europe and the USA. The mosquito that transmits chikungunya is found very widely throughout the world and, as a result of infected travellers introducing it into new countries, it has spread very widely and has become a major global health problem.
Chikungunya is an unpleasant disease but is rarely fatal. Symptoms usually start about 4-8 days from a bite by an infected mosquito and include:
- sudden high fever
- severe joint pains (arthralgia) and muscle pains (myalgia)
- headaches
- sensitivity to light (photophobia)
- skin rashes
The symptoms usually improve within 1-2 weeks, but the joint pains can be severe and may persist for months or even years.
Occasional cases of eye, neurological and heart complications have been reported, as well as gastrointestinal complaints.
There is no specific antiviral treatment for chikungunya. Treatment consists of rest, fluids and medicines for pain and fever, such as ibuprofen or paracetamol.
Travellers visiting areas with on-going outbreaks are at risk of being infected with CHIKV. The risk areas are constantly changing and evolving, and travellers should check the latest information on outbreaks before they travel. Outbreaks of chikungunya in new areas are recorded in the Outbreak Surveillance section of our website. Travellers can check whether there is a risk of chikungunya in a country by looking at the 'Other Risks' tab; 'Biting insects or ticks' section of our Country Information pages.
Prevention
Travellers should seek advice from a health professional prior to travel for information on the risk of chikungunya at their destination.
Mosquito bite avoidance is recommended, particularly during daytime hours.
There are currently no vaccinations (or medications) to prevent chikungunya in the UK.
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Updated: 06 November 2024Recent Chikungunya Outbreaks
Chikungunya in India
As of 31 October, India recorded 12,587 chikungunya cases since the beginning of 2024. This accounts for the highest number of confirmed cases in the past six years. The states of Andhra Pradesh, Maharashtra, Tamil Nadu, Tripura and Uttarakhand are showing a substantial increase in cases compatared to the past six years. Please see our Topics in Brief article for further details on Chikungunya.
Chikungunya in Reunion
As of 22 November 2024, Regional Health Agency Reunion have reported a total of 20 confirmed cases of locally acquired chikungunya since 23 August 2024 when the first case in ten years was identified. Outbreaks remain active in the west of the island. Please see our Topics in Brief article for further details on chikungunya.
Chikungunya in Brazil
As of 28 September 2024, a total of 349,739 chikungunya cases have been reported in Brazil since the beginning of 2024.
Chikungunya in Paraguay
As of 28 September 2024, a total of 2,739 chikungunya cases have been reported in Paraguay since the beginning of 2024.
