Dimorphic fungus.

Location: Southwestern US, California- Found in desert sand

Pathology: Spherule filled with endospores of Coccidioides

Disease: Valley fever- Flu-like illness or pneumonia- Dissiminates to skin/bone→ Erythema nodosum (desert bumps)→ Arthralgias (desert rheumatism)- Can cause meningitis- Pulmonary lesions have a tendency to calcify after they heal.