A different kind of testing will be taking place at Thaxton Elementary School tomorrow. Students were back in the classroom this week after a case of tuberculosis was confirmed there last week. Tuberculosis, is a bacterial infection that usually affects the lungs health experts say the germ is spread through airborne contact usually associated with coughing, sneezing, talking or singing; on Friday, The Virginia Department of Health notified Bedford County Public Schools on Friday, that someone at the school tested positive for the infection. On Wednesday, state health officials will test 28 people, potentially exposed. The school has not said whether the person with TB is a student, faculty/staff member or parent.