Tuberculosis Clinical Trial
Official title:
Predictive Values of Next Generation Interferon Gamma Release Assays for Latent Tuberculosis Infection
This study will assess the next generation of blood tests for latent TB infection, which may be able to indicate how treatment is working as well as in diagnosis infection.
Currently available blood tests for latent tuberculosis infection (LTBI) identify people who have been previously infected with M. tuberculosis. Whilst they are sensitive and specific, they cannot be used to monitor the effectiveness of treatment for LTBI. New blood tests ("fourth generation Quantiferon tests") give a more complete measurement of the workings of the immune system, which may be useful to show whether treatment is working. These new tests have not yet been evaluated in clinical practice, so their usefulness in identifying people at highest risk of TB disease and monitoring treatment is unknown. Mass gatherings, such as the annual Hajj pilgrimage, may encourage the spread of infectious diseases, including respiratory infections such as influenza, respiratory syncytial virus, and possibly also tuberculosis. However, the risk of TB infection during the Hajj has not been reliably measured. It is important to measure this risk so that pilgrims can be given suitable advice about preventing infection. ;
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