Chikungunya.

Chikungunya fever is a viral disease transmitted to humans by the bite of infected Aedes aegypti mosquito. Like malaria and dengue, this infection has almost become endemic in India, especially central and south India. Symptoms of sudden onset of fever, chills, headache, nausea, vomiting, joint pain with or without swelling, low back pain, and rash are very similar to those of dengue but, unlike dengue, there is no hemorrhagic or shock syndrome form. Chikungunya is a self-limiting illness with no specific treatment. Travellers visiting endemic areas should be careful and take precautions to see that they are not bitten by mosquitoes.