10/16/2012 03:02 EDT | Updated 12/16/2012 05:12 EST

CDC: Cases of a rare fungal meningitis rise to 231; number of deaths remain at 15

An outbreak of fungal meningitis has been linked to steroid shots for back pain. The medication, made by a specialty pharmacy in Massachusetts, has been recalled.

Latest numbers from the Centers for Disease Control and Prevention:

Illnesses: 231 cases of fungal meningitis; two joint infections

Deaths: 15

States: 15; Florida, Idaho, Illinois, Indiana, Maryland, Michigan, Minnesota, New Hampshire, New Jersey, North Carolina, Ohio, Pennsylvania, Tennessee, Texas and Virginia.