Screening Information for Medical Providers
- Person traveling in TB endemic areas
- Migrant workers
- Person experiencing homelessness
- Contact to a TB case
- Foreign-born person from TB endemic area
- Person who injects drugs
- Immunosupressed person (e.g., HIV positive or organ transplant)
- Resident/employee of healthcare, correctional, or long-term care facility
- Person with chronic medical problem (e.g., diabetes, ESRD, etc.)
Types of Tests
- TB Skin Test (TST)
- A Mantoux test with Tubersol or Aplisol PPD material
- Remember to date the vial and discard 30 days after opening
- Tine tests are no longer recommended
- Interferon Gamma Release Assay
- Blood testing for TB infection with a QuantiFeron-TB Gold In-tube® (QFT)
- Available at most laboratories
When Should Testing Be Done?
Screening should occur when a patient fits the criteria for testing. Testing is required for:
- Healthcare workers or healthcare students*
- Residents of long-term care nursing facilities
- Persons who inject drugs
* Two-step testing is required for healthcare workers at entry and people admitted to nursing homes.
Per Tacoma-Pierce County Health Department policy and the Centers for Disease Control and Prevention (CDC), a verbal report of a positive skin test is unacceptable. There must be written documentation.
- If no documentation is available, a skin test should be applied and read. If it is positive, a chest x-ray should be ordered.
- A TST “converter” is a person who has an increase in reaction size of ≥10 mm within a period of two years.