Coccidioidomycosis

Histo-pathological changes in a case of coccidioidomycosis of the lung showing a large fibrocaseous nodule. Coccidioidomycosis (also known as Valley fever and California valley fever) is a fungal disease caused by Coccidioides immitis or C. posadasii. It is endemic in certain parts of Arizona, California, Nevada, New Mexico, Texas, Utah and northwestern Mexico. C. immitis resides in the soil in certain parts of the southwestern United States, northern Mexico, and a few other areas in ...