Health

What is valley fever? How the spore-caused illness makes you sick

Caused by the fungus Coccidioides, the illness is contracted by inhaling fungal spores in the air.

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Valley fever cases increased in several Southern California counties in 2024, according to the California Department of Public Health.

Caused by the fungus Coccidioides, the illness is contracted by inhaling fungal spores that are commonly found in hot and dry climates. Wet weather can promote the growth of that fungus, making for an uptick in cases when the rainy season hits the Southland.

Activities like construction, walking or strong weather can disturb dirt, which could send those small fungal spores in the air and make people or animals inhale them.

Valley fever symptoms include:

  • Cough
  • Difficulty breathing
  • Headache
  • Rash
  • Fatigue
  • Chest pain
  • Weight loss
  • Chest pain
  • Muscle or joint paint
  • Fever
  • Night sweats

About 6 in 10 people will not show symptoms and their bodies will fight off the infection. It can also be treated with anti-fungal medication.

The illness is not contagious since it’s contracted by inhaling the spores. Since the symptoms are similar to respiratory disease, it’s best to seek a laboratory test to determine if an illness is valley fever, influenza or COVID-19.

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