Detection of proliferative responses to ESAT-6 and CFP-10 by FASCIA assay for diagnosis of Mycobacterium tuberculosis infection
2011
Abstract There is a large and growing worldwide need for reliable tests to diagnose active and latent tuberculosis (TB). Improved methodology for identifying individuals with true latent TB (LTBI), particularly those with a recent infection, would pave the way for targeted prophylactic treatment. The traditionally used tuberculin skin test (TST) is unspecific and impractical. Interferon gamma release assays (IGRA) are more specific than the TST but, like that test, cannot discriminate either between recent and remote TB infection, or between these and a mere immunological memory of previous TB infection. The Flow-cytometric Assay for Specific Cell-mediated Immune-response in Activated whole blood ( FASCIA) combines long-term antigen stimulation of whole blood and flow-cytometric analysis with quantification of the expanded T-lymphoblasts and can also be employed for measurement of cytokine responses.
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