Valley fever is a disease caused by a fungus known as Coccidiodes immitis. Although the proper name for this disease is coccidioidomycosis, it is most often called valley fever, California disease, desert rheumatism, or San Joaquin valley fever. It is caused by spores in the ground that become airborne.
Valley Fever (VF) spores are everywhere. Everyone inhales them all of the time. The determination about whether or person or animal contracts Valley Fever from the spores is totally dependent on their immune system.
