Pulmonology

TB-PCR (molecular testing) detects Mycobacterium tuberculosis DNA in a sample and delivers results within 24–48 hours. A traditional culture takes 4–8 weeks for Mycobacterium to grow. PCR is preferred for rapid diagnosis, while culture remains essential for drug susceptibility testing.

Adenosine Deaminase (ADA) is an enzyme that is significantly elevated in tuberculous pleural, pericardial and CSF effusions. An elevated ADA (>40 U/L in pleural fluid) is highly suggestive of TB pleuritis with over 90% sensitivity and specificity, saving time before culture results are available.

Quantiferon-TB Gold Plus (IGRA) is generally preferred because it requires only a single blood draw, is not affected by prior BCG vaccination, and has superior specificity. It is the test of choice for healthcare workers, immunocompromised individuals, and recent TB contacts.

Blood-based pulmonology tests (CBC, serum ACE, tumour markers, IgE, Quantiferon) are all available via our free home collection service. Sputum and BAL specimens need to be collected at the lab or at the clinical site with guidance from our team.

Sputum Gram stain results are available in 24–48 hours. TB culture on LJ medium takes 4–8 weeks; liquid MGIT culture gives results faster in 2–3 weeks. We will keep you updated on progress and flag any critical results immediately.