Chikungunya Disease, 2014
Chikungunya virus is a mosquito-borne alphavirus found in Africa, Asia, and more recently, Europe. In late 2013, locally acquired cases appeared for the first time in the Americas, on the Caribbean island of St. Martin; over 1 million suspected cases were recorded from the Caribbean by 2015. The virus is transmitted by the same Aedes spp. mosquitoes (Ae. aegypti and Ae. albopictus) that also transmit dengue virus, and the two often occur in concurrent outbreaks.
Unlike many other mosquito-borne viruses, most people who are infected with Chikungunya develop symptoms. The most common symptoms are fever and joint pain, but patients may also experience headache, muscle aches, or rash. Symptoms usually begin 3-7 days after a person is bitten by an infected mosquito, and most recover within a week. Joint pain may persist for weeks to years after the initial illness.
In 2014, 28 cases of chikungunya were reported in Minnesota residents. The median case age was 38 years (range, 11 to 71 years). Twenty-three cases (82%) resided in the metropolitan area, and symptom onsets occurred from early March through November. All of the cases represented imported infections acquired abroad, and all had travelled to either the Caribbean (25) or South America (3).
Nationwide, chikungunya cases were reported from 47 states and the District of Columbia. Although the majority of cases were acquired while traveling abroad, 11 locally transmitted cases were reported in Florida.
- For up to date information see>> Mosquito-borne Diseases
- Full issue>> Annual Summary of Communicable Diseases Reported to the Minnesota Department of Health, 2014