Tuberculosis positive case found at Penn Wood Middle School in Darby, Delaware County - WPVI-TV

DARBY, Pennsylvania (WPVI) -- The Delaware County Health Department says a person at Penn Wood Middle School in the William Penn School District has tested positive for tuberculosis.

Representatives are working to identify students and staff of the Darby school who might have been exposed to the illness.

The health department stresses that students and staff can continue active learning in the school setting because TB is not as contagious as the flu and requires extended close contact (around at least 15 hours of contact per week) to spread.

Those identified as close contacts are being notified by the Health Department for testing arrangements," the DCHD said in a statement released Monday.

Parents with concerns should call the Delaware County Health Department Wellness Line, available Monday through Friday, from 8:30 a.m. to 4:30 p.m., by phone at (484) 276 - 2100 or by email at DelcoWellness@co.delaware.pa.us.

From there, they can move through the blood to other parts of the body, such as the kidney, spine, and brain.