Two Ohio state employees are suing the university saying they became ill as a result of negligence during repair work being done in the building where they worked.
Amy Franklin and Olga Stavridis say they both contracted Histo-plas-MOH-sis as a result of exposure to the fungus that causes the disease.
In a statement Friday afternoon, Ohio State officials say testing by outside experts found the women's work environment to be safe, and the cause of their illness "remains a mystery."