**FILE** The Exserohilum rostratum fungus is seen here. Exserohilum, a kind of black mold, is the primary cause of a number of fungal meningitis cases afflicting people who got steroid back injections for pain. (Associated Press/The Centers for Disease Control and Prevention)

**FILE** The Exserohilum rostratum fungus is seen here. Exserohilum, a kind of black mold, is the primary cause of a number of fungal meningitis cases afflicting people who got steroid back injections for pain. (Associated Press/The Centers for Disease Control and Prevention)