|Description:||This illustration depicts the ultrastructural details found in the dimorphic fungal organism, Coccidioides immitis including the hyphae, developing endospore-filled spherules, and a mature spherule ready to rupture, and release its contents of mature endospores into its environment.|
Coccidioidomycosis, also known as Valley Fever, is a fungal disease caused by Coccidioides species. These organisms live in the soil of semiarid areas. It is endemic in areas such as the southwestern United States, parts of Mexico and South America. It is a reportable disease in states where the disease is endemic, such as California, New Mexico, Arizona and Nevada. Of people who live in an endemic region, about 10-50% will have evidence of exposure to Coccidioides.