What are the alternatives to tuberculosis screening?

Screening usually looks for evidence of infection in someone without symptoms. A skin-based test and a blood-based immune test assess different immune responses and may not suit every age, health condition, or vaccination history. A chest X-ray does not replace every screening test: it helps look for changes in the lungs and is more relevant when symptoms or a positive screening result raise concern about active disease. Latent tuberculosis infection can exist without symptoms, while tuberculosis disease may cause cough, fever, night sweats, or weight loss.

Explain any previous tuberculosis test, vaccination, exposure, travel, work requirement, pregnancy, immune-suppressing medicine, and current symptoms. The clinician may choose a blood test, a skin test, a chest X-ray, or several assessments together. Do not start or stop treatment based on a screening result alone; a positive result needs interpretation and may require evaluation for latent tuberculosis infection or tuberculosis disease.

Arrange prompt medical assessment for a persistent cough, coughing blood, fever that does not settle, drenching night sweats, unexplained weight loss, chest pain, or breathlessness after possible exposure. Seek urgent help for severe breathing difficulty, confusion, fainting, or coughing a large amount of blood. Mention possible tuberculosis before attending a clinic so staff can advise on precautions.

Which test fits my reason for screening? Could prior vaccination affect the result? Do I need a chest X-ray? What follow-up is needed after a positive or unclear result?