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Texas Confirms State’s First Chikungunya Case

The Texas Department of State Health Services has confirmed the state’s first human case of chikungunya, a viral disease spread to humans by mosquitoes. It can cause fever and severe joint pain.

The infected patient recently returned to Texas from a trip to the Caribbean where chikungunya has been causing human disease since late 2013. To date, no local spread of the virus has been reported in the continental United States, though imported cases make local spreading possible because the mosquitoes that can transmit the virus are found in Texas. The Texas case involves a Williamson County resident.

Chikungunya is not transmitted directly from person-to-person contact, however, a person with the disease can transmit the virus to a mosquito after being bitten, allowing that mosquito to bite and transmit to more humans. The spread of the disease can help to be prevented by affected individuals avoiding mosquito exposure during the first week of illness.

Infections are rarely fatal but can cause severe joint pain, high fever, head and muscle aches, joint swelling and rash. Symptoms usually begin three to seven days after being bitten by a mosquito. There is no vaccine or treatment for the virus. Most people feel better within a week, though some people may develop long-term joint pain.

DSHS encourages people to protect themselves from mosquito bites at home and while traveling. The Aedes mosquitoes that transmit chikungunya are active and bite during the day. Precautions include:

  • Use an approved insect repellent every time you go outside, and follow label instructions.
  • Drain standing water where mosquitoes can breed.
  • Wear long sleeves and pants when outside.
  • Use air conditioning or make sure doors and windows are screened to keep mosquitoes outside.

According to the Centers for Disease Control and Prevention, with recent outbreaks in the Caribbean and the Pacific, the number of chikungunya cases among travelers visiting or returning to the United States from affected areas will likely increase. Cases have occurred in Africa, Southern Europe, Southeast Asia, and islands in the Indian and Pacific Oceans.

Because the symptoms are similar, DSHS encourages physicians to consider both chikungunya and dengue infection in patients with acute onset of fever and joint pain and who have recently visited areas where at least one of the viruses is present.

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