The Colorado tick fever - A viral illness transmitted by the bites of infected ticks. It occurs in the mountain areas of the western United States, usually in early summer.
Symptoms appear 3–6 days after a tick bite; they include flulike chills and fever, severe headache, nausea, and sometimes a red, raised rash. The illness usually lasts for a few days, subsides, then returns for a further few days. The virus can, how-ever, remain in the blood for several months.
Treatment involves removal of the tick as soon as possible and taking analgesic drugs (painkillers) if necessary. Tick bites can be prevented by wearing clothing that covers the arms and legs and tucking trouser legs into socks. (See also ticks and disease.)
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