Coccidioidomycosis is an infection of the lungs. It is also called Valley Fever. This infection is caused by a germ called a fungus. This kind of germ can live in hot, cold, and dry places. It spreads when we breathe in the germ spores in the air. The spores come from dirt being moved around. You cannot catch this illness from some other person. Most cases are mild and go away without treatment. Some cases will need treatment. This most often happens if you have some other serious illness. Sometimes, no treatment is needed. Your signs may go away on their own. Other times, the doctor will give you drugs to stop a more serious infection from developing.