The Department of Health and Environmental Control said Tuesday that 73 people affiliated with Ninety Six Primary School have had positive skin tests for the disease. More than 600 have been tested, and 12 people have developed tuberculosis.

Officials have traced the positive tests to a school employee. Last week, DHEC director Catherine Templeton ordered that person confined to a medical lockdown facility until the infection passes.

Templeton said the employee had not cooperated with previous orders to stay at home. Also last week, a second person was determined to be contagious and ordered to stay at home.