What should you know about an IGRA blood test?

A positive IGRA suggests previous or current tuberculosis infection. It does not tell your clinician when infection occurred, whether it is active, or whether you are infectious. A negative result reduces the likelihood of infection, although recent exposure or reduced immune function can make a result less reliable. An indeterminate result may lead to repeat testing or a different test.

The result is not a general explanation for tiredness, fever, or abnormal blood findings. Similar symptoms can occur with conditions such as anaemia, brucellosis, dengue fever, or glandular fever, so the rest of your assessment matters.

Attend the follow-up arranged by the requesting clinician. Share details of any tuberculosis contact, prior tuberculosis testing or treatment, recent travel, and medicines or illnesses that affect immunity. The test requires a blood sample; ask whether you need any preparation because other tests may be taken at the same visit.

If your result is positive, further assessment may include a symptom review, examination, and chest imaging. Take prescribed treatment exactly as directed and report troublesome effects rather than changing doses yourself.

Contact a clinician promptly if you develop a cough that persists, fever, night sweats, chest pain, coughing blood, or unexplained weight loss after exposure to tuberculosis. Get urgent help for severe breathlessness, confusion, or significant bleeding. These warning signs need assessment regardless of the IGRA result.

Ask what your result means in light of your exposure, whether you need imaging, whether another test is needed, and how any immune-suppressing medicine affects the plan.