Multi-drug-resistant strains of TB have been reported in 40 states and caused outbreaks in at least 21 hospitals. In these outbreaks, 18 to 35 percent of exposed workers had documented conversion tuberculin testing.

• 1 An RN working at a major medical center contracted multi-drug resistant TB while caring for neurology, renal and overflow TB patients from another unit. The nurse was unable to work for two of the three years of her treatment. Her treatment included surgery to remove half of a lung.
• 2 Five personnel present during a 3-hour autopsy converted from negative to positive skin tests. Two of these persons had a positive sputum culture eight weeks later.