Skip to main content

Login to North West London Pathology – consumables service

If you need a new account or you have a query about your order, please telephone the pathology call centre on 0203 313 5353.

If you have forgotten your password you can reset this yourself. Please click here if you have forgotten your password.

Results Line and Enquiries

0203 313 5353

TB ELISPOT

Category Immunology
Test background

This assay detects interferon-gamma (IFN-γ) secretion in response to stimulation with Mycobacterium tuberculosis antigens. A positive test indicates presence of TB infection but cannot be used to distinguish active disease from latent infection. The negative predictive value of this test for TB infection is 98 %.

Clinical Indications

TB infection

Reference range

Negative

Sample & container required 8mL sodium citrate (pale blue top) or 10 mL heparin (green top);
Samples must be received in the laboratory (Charing Cross) by 2pm Monday to Friday for the test to be performed.
Sample volume See above
Turnaround time 4 days