Testing & Screening

TBTuberculosis Screening

Testing for tuberculosis infection — by skin test (PPD) or blood test (IGRA) — common for health-care and at-risk workers.

Reviewed June 2026 by Enterprise Health

Key facts

  • Detects TB infection via skin test (PPD) or blood test (IGRA).
  • Health systems screen on hire and periodically.
  • Positives get chest-X-ray follow-up tracked in the record.

What it means

TB screening uses the tuberculin skin test (PPD/Mantoux) or an interferon-gamma release assay (IGRA) blood test to detect infection. Health systems screen on hire and periodically, tracking two-step baselines, conversions and follow-up. Results, due dates and chest-X-ray follow-up for positives all live in the surveillance record.

Frequently asked

How is TB screening performed?

By a tuberculin skin test (PPD/Mantoux) or an interferon-gamma release assay (IGRA) blood test. Health systems screen on hire and periodically, tracking two-step baselines and conversions.

What happens after a positive TB test?

A positive result triggers follow-up, typically including a chest X-ray to rule out active disease. Results, due dates and follow-up all live in the surveillance record.

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