Symptoms, Diagnosis, & Treatment
- Many people infected with Jamestown Canyon virus do not have symptoms.
- For people with symptoms, the time from mosquito bite to feeling sick ranges from a few days to 2 weeks.
- Initial symptoms can include fever, fatigue, and headache. Some people also have respiratory symptoms such as cough, sore throat, or runny nose.
- Jamestown Canyon virus can cause severe disease, including infection of the brain (encephalitis) or the membranes around the brain and spinal cord (meningitis).
- Symptoms of encephalitis or meningitis include stiff neck, confusion, loss of coordination, difficulty speaking, or seizures.
- About half of patients reported with Jamestown Canyon virus disease are hospitalized.
- Deaths associated with Jamestown Canyon virus infection are rare.
- See your healthcare provider if you develop the symptoms described above.
- Your healthcare provider can order tests to look for Jamestown Canyon virus infection.
- More information on diagnostic testing is available on the “For Healthcare Providers” page.
- There is no medicine to treat Jamestown Canyon virus infection.
- Treat the symptoms:
- Get plenty of rest.
- Drink fluids to prevent dehydration.
- Take over-the-counter pain relievers to reduce fever.
- Some patients with severe symptoms may need to be hospitalized.
Page last reviewed: November 27, 2019