What is Valley Fever? 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”. Where is Valley Fever found? This soil-dwelling fungus has adapted to survive in desert climates and is prevalent in certain parts of Arizona, California, Nevada, New Mexico, Texas,… continue reading