First identified during an outbreak in Tanzania in 1952, chikungunya is a virus that is transmitted between humans by the Aedes aegypti mosquito. The word chikungunya comes from the Kimakonde language. It means ‘to become contorted’, as the disease causes debilitating joint pain that induces a stooped appearance.
In 2015, there was a large outbreak across the Americas, with more than 1,300,000 suspected cases of chikungunya recorded in the Caribbean islands, Latin America and the United States. More than 190 deaths were attributed to this disease during this period.
Chikungunya is caused by a virus transmitted primarily by Aedes aegypti mosquitoes. These mosquitoes bite during the day, usually just after sunrise and around sunset.
- Sudden-onset fever
- Joint and muscle pain
Chikungunya causes severe fever and debilitating joint pain, and shares some clinical signs with Zika and dengue, which sometimes leads to misdiagnosis in areas where these diseases are prevalent. Symptoms usually improve within a week; however, sometimes the joint pain may last for months or even years.
More about chikungunya
- 1Where does chikungunya occur?
Chikungunya is most prevalent in Asia, Africa, the Americas and the Pacific. It also occurs in warmer parts of Europe. Approximately 40 countries are affected.
- 2How many people are affected by chikungunya?
Chikungunya causes an estimated 3,000,000 infections each year. Outbreaks are often separated by periods of more than 10 years, so it is difficult to assess the global burden of this disease, but the virus is widespread.
- 3How does chikungunya spread?
Chikungunya spreads wherever Aedes aegypti mosquitoes are present. It is a human virus transmitted primarily by this mosquito, which is commonly found around homes and urban areas.
- 4How is chikungunya treated?
There is no specific antiviral drug treatment for chikungunya. Symptoms can last from months to years. Treatment primarily focuses on relieving symptoms with common medications.
- 5How can we help prevent chikungunya?
There is no vaccine for chikungunya.
Prevention relies heavily on reducing the number of natural and artificial stagnant water habitats that support mosquito breeding. Other methods of control involve using insecticides and personal repellents, and wearing protective clothing.
However, the World Mosquito Program’s Wolbachia method is showing promising results internationally, helping to block the transmission of chikungunya, as well as other viruses transmitted by Aedes aegypti mosquitoes, such as Zika, dengue and yellow fever.
Download this information about chikungunya, its symptoms, treatments and prevention techniques.