Chikungunya.

Chikungunya is a rapidly emerging infectious disease caused by a virus of the genus Alphavirus, family Togaviridae. Most commonly, patients have an acute onset of fever with often debilitating symmetric joint discomfort that can relapse months after the initial infection. This infection is typically transmitted by the bite of an infected Aedes aegypti or Aedes albopictus mosquito, vectors that also transmit dengue and yellow fever. Special Operations Forces Medical Providers should be aware of this disease, which is currently being diagnosed worldwide.