Colorado tick fever
Colorado tick fever is an acute viral infection transmitted by the bite of the Dermacentor andersoni tick.
Mountain tick fever; Mountain fever; American mountain fever
This disease most commonly develops from March to September, with the highest numbers of infections occurring in May and June.
Risk factors are recent outdoor activity and recent tick bite. The rate of Colorado tick fever is high in Colorado, where blood tests have shown that up to 15% of campers have previously been exposed to virus that causes the disease.
The disease is much less common in the rest of the United States.
Symptoms start about 3 to 6 days after the tick bite. Symptoms of fever continue for 3 days, stop, then come back 1 to 3 days later for another few days.
- Sudden fever
- Excessive sweating
- Severe muscle aches
- Joint stiffness
- Photophobia (sensitivity to light)
- Nausea and vomiting
- Generalized weakness
- Occasional rash (may be light-colored)
Exams and Tests
Tests will be done to confirm infection. These may include:
- Complement fixation to Colorado tick virus
- Immunofluorescence for Colorado tick fever -- will be positive if the person has the disease
Other blood tests may include:
Make sure the tick is fully removed from the skin. Take a pain reliever if necessary (do not give aspirin to children; it is associated with Reye's syndrome in some viral illnesses). If complications develop, treatment will be aimed at controlling the symptoms.
The disease is usually self-limiting and not dangerous.
There is a risk for aseptic meningitis, encephalitis, and hemorrhagic fever, but these complications are extremely rare.
When to Contact a Medical Professional
Call your health care provider if you are unable to fully remove a tick embedded in the skin, if you or your child develop symptoms suggestive of this disease, if symptoms worsen or do not improve with treatment, or if new symptoms develop.
When walking or hiking in tick-infested areas, tuck long pants into socks to protect the legs, and wear shoes and long-sleeved shirts. Ticks will show up on white or light colors better than dark colors, making them easier to remove from your clothing.
Check yourself and your pets frequently. If you find ticks, remove them immediately by using a tweezers, pulling carefully and steadily. Insect repellent may be helpful.
Email to a Friend
Typical mistypes for Colorado tick fever
xolorado tick, volorado tick, folorado tick, dolorado tick, cilorado tick, cklorado tick, cllorado tick, cplorado tick, c0lorado tick, c9lorado tick, cokorado tick, coporado tick, cooorado tick, colirado tick, colkrado tick, collrado tick, colprado tick, col0rado tick, col9rado tick, coloeado tick, colodado tick, colofado tick, colotado tick, colo5ado tick, colo4ado tick, colorzdo tick, colorsdo tick, colorwdo tick, colorqdo tick, coloraso tick, coloraxo tick, coloraco tick, colorafo tick, coloraro tick, coloraeo tick, coloradi tick, coloradk tick, coloradl tick, coloradp tick, colorad0 tick, colorad9 tick, colorado rick, colorado fick, colorado gick, colorado yick, colorado 6ick, colorado 5ick, colorado tuck, colorado tjck, colorado tkck, colorado tock, colorado t9ck, colorado t8ck, colorado tixk, colorado tivk, colorado tifk, colorado tidk, colorado ticj, colorado ticm, colorado ticl, colorado tico, colorado tici, olorado tick, clorado tick, coorado tick, colrado tick, coloado tick, colordo tick, colorao tick, colorad tick, coloradotick, colorado ick, colorado tck, colorado tik, colorado tic, oclorado tick, cloorado tick, coolrado tick, colroado tick, coloardo tick, colordao tick, coloraod tick, colorad otick, coloradot ick, colorado itck, colorado tcik, colorado tikc, ccolorado tick, coolorado tick, collorado tick, coloorado tick, colorrado tick, coloraado tick, coloraddo tick, coloradoo tick, colorado tick, colorado ttick, colorado tiick, colorado ticck, colorado tickk, etc.