Health officials have confirmed a case of tuberculosis at a high school in suburban Detroit.
WXYZ-TV reports that a student at Northville High School was diagnosed with an active case of the disease and local health officials are working to determine the extent of possible exposure.
Parents were notified Monday by a letter from Principal Robert E. Watson, “The protocol followed by the Health Department is to identify other individuals who may be at higher risk of exposure to Tuberculosis during the infectious time period… and to provide an opportunity for testing the identified individuals. ” The infectious time period in this case was January 2012 through April 2012.
Active TB, unlike the latent form of the disease, causes symptoms, is transmittable, and can be fatal if untreated.
According to the Centers for Disease Control, TB bacteria are primarily spread through the air from person to person (e.g. through coughing or sneezing and inhaling bacteria) but not through physical contact like shaking hands.
Data from the CDC show Michigan as having a relatively low incidence rate of TB - 184 cases in 2010 (or 1.9 per 100,000 people). That compares to 11,182 cases nationwide (or 3.6 per 100,00o).
U.S. rates, which have declined steadily for the past 20 years, are dwarfed by the roughly 9 million global cases in 2010 estimated by the World Health Organization.
-John Klein Wilson, Michigan Radio Newsroom