Coccidioidomycosis, commonly called valley fever, is a fungal infection of the lungs that can cause serious problems.
The fungus that causes valley fever is found in the soil, most commonly in the southwestern United States, Mexico, and parts of Central and South America. The fungus lives in the soil, but it is transported through the air and into the lungs, where it infects people who breathe it in. When soil that contains the fungus is disturbed, spores are released into the air.
The disease cannot be transmitted from person to person.
People who are at increased risk of exposure to the fungus include:
- Construction workers
- People in the military
- People who work with or who are frequently exposed to soil
People who are at increased risk of getting valley fever after exposure include:
- People with weakened immune systems
- Elderly people
- African Americans
- Women in the third trimester of pregnancy
Some people have no symptoms of valley fever. Others may have:
- Chest pain
- Shortness of breath
Flu-like symptoms that lasts for weeks or a month, including
- Night sweats
- Aching in the joints
- Rash that consists of painful red bumps
- Fatigue that lasts longer than a few weeks
The fungus can affect other parts of the body besides the lungs, but it is then called disseminated valley fever.
You will be asked about your symptoms and medical history. A physical exam will be done.
Your bodily fluids may be tested. This can be done with:
- Blood tests
- Sputum smear or culture
Talk with your doctor about the best treatment plan for you. Treatment options include:
- Bed rest and fluids—Many patients with valley fever do not need treatment with medication. The infection will go away on its own. Bed rest and drinking plenty of fluids will quicken recovery.
- Antifungal medication—Some patients, especially those with weakened immune systems, chronic diseases, severe pneumonia, disseminated valley fever, meningitis, or primary infection in third trimester of pregnancy may be prescribed an antifungal medication.
There is no effective way to prevent being infected with valley fever. Take extra precautions in areas where the infection is most common and during warm months when the chance of infection is increased.
To help reduce your chances of getting valley fever, take the following steps:
When working outside in the soil, especially in areas where the fungus is common, you should:
- Always wear a mask.
- Wet the soil to reduce the spores in the air.
- Keep doors and windows tightly closed in areas where the fungus is common.
- Go inside during a dust storm.
Family Doctor—American Academy of Family Physicians
Valley Fever Connections
Public Health Agency of Canada
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Fisher BT, Chiller TM, et al. Hospitalizations for coccidioidomycosis at forty-one children's hospitals in the United States. Pediatr Infect Dis J. 2010 Mar;29(3):243-247.
Galgiani JN. Valley fever tutorial for primary care professionals. The Valley Fever Center for Excellence website. Available at http://www.vfce.arizona.edu/resources/pdf/Tutorial_for_Primary_care_Physicians.pdf. Updated 2012. Accessed December 22, 2014.
Hector RF, Rutherford GW, et al. The public health impact of coccidioidomycosis in Arizona and California. Int J Environ Res Public Health. 2011;8(4):1150-1173.
Valley fever in people. Valley Fever Center for Excellence website. Available at: https://www.vfce.arizona.edu/ValleyFeverInPeople/Default.aspx. Accessed December 22, 2014.
Last reviewed December 2014 by Michael Woods, MD
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.