Valley Fever

table with dust storm with 2019 case rate data of valley fever showing Arizona as highest stateValley fever (also called coccidioidomycosis, or cocci) is an infection caused by the fungus Coccidioides, that can be found in the soil. The term “Valley fever” usually refers to Coccidioides infection in the lungs but the infection can spread to other parts of the body in severe cases.

The fungus is found in the soil throughout the southwestern United States (Arizona, California, Nevada, New Mexico, Texas, and Utah) and in Central and South America. Coccidioides has also been identified in other parts of the United States including south-central Washington.

  1. Data and Reports
  2. Signs & Symptoms
  3. Diagnosis
  4. Treatment

Confirmed valley fever cases in Maricopa County as of 1/3/2024

This table is updated monthly

Number of new cases reported in December7531,1679235551,133
Number of cases reported from 1/1-12/317,2698,1598,5466,9288,002
Total number of cases reported for entire year:7,2698,1598,5466,928 8,002

*Note: 2022 and 2023 data are preliminary and subject to change.