Three dozen students and staff at Grant Union High School have tested positive for exposure to tuberculosis in the latest round of testing.
Of the more than 450 people screened last week, about 200 students had been in the same classrooms as the initial student who tested positive for TB in March, or in rooms that shared air circulation systems.
Tuberculosis is a bacterial disease that can spread through the air.
Sacramento County health officials also opened up testing to others who wanted to voluntarily to be screened for TB.
Of the 200 students who shared classrooms with the initial student, or were in classrooms that shared an air circulation system with those rooms, 29 tested positive for exposure. They will be evaluated further and offered preventive treatment.
Of the voluntary screenings, another seven people tested positive for exposure to tuberculosis. According to health officials, this number is consistent with exposure rates in the general population.
These cases are in addition to the more than 120 who tested positive for latent tuberculosis earlier this year.
There were four students who had active cases of TB, they were treated and according to Sacramento health officials, are not infectious.
There have been no infectious cases of TB discovered at Grant Union High School since the initial exposure in March.
In Case You Missed It: