About 100 Iowa State students have been tested for tuberculosis after a student was diagnosed last week with an active case of the contagious disease.

Dr. Robert Patterson, the director of the Student Health Center, said some people in close association with the patient were tested and found to be infected with the disease. After the Health Center found that these associates tested positive, personnel from the Health Center went to the patient’s classes and advised students to be tested now and again in three months.

About 100 students were tested, and none were found to be infected.

Patterson said he did not know if the patient lived on or off campus, but he said no on-campus residents have been tested for the disease. He would not disclose which class it was that received the testing.

Patterson emphasized that tuberculosis is not as contagious as a viral infection. It takes longer and repeated exposure for healthy adults to be affected. He also said although tuberculosis is very serious, it is “imminently treatable.” The Student Health Center offers free testing.