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The blood tests QuantiFERON-TB Gold In-Tube and T-SPOT.TB use these antigens to detect people with tuberculosis. Lymphocytes from the patient's blood are incubated with the antigens. These tests are called interferon γ tests and are not equivalent. [19] If the patient has been exposed to tuberculosis before, T lymphocytes produce interferon γ ...
According to the U.S. Centers for Disease Control, [2] in 2001, the Quantiferon-TB test (QFT) was approved by the Food and Drug Administration (FDA) as an aid for detecting latent Mycobacterium tuberculosis infection. This test is an in vitro diagnostic aid that measures a component of cell-mediated immune reactivity to M. tuberculosis.
T-SPOT.TB, a form of ELISpot, the variant of ELISA (licensed in Europe, US, Japan and China). [3] The former test quantitates the amount of IFN-γ produced in response to the ESAT-6 and CFP-10 antigens from Mycobacterium tuberculosis, which are distinguishable from those present in BCG and most other non-tuberculous mycobacteria.
T-SPOT.TB counts the number of antimycobacterial effector T cells, white blood cells that produce interferon-gamma, in a sample of blood.This gives an overall measurement of the host immune response against mycobacteria, which can reveal the presence of infection with Mycobacterium tuberculosis, the causative agent of tuberculosis (TB).
An assay (analysis) is never an isolated process, as it must be accompanied with pre- and post-analytic procedures. Both the communication order (the request to perform an assay plus related information) and the handling of the specimen itself (the collecting, documenting, transporting, and processing done before beginning the assay) are pre-analytic steps.
Whole blood: CBC, ESR, Coombs test, platelet antibodies, flow cytometry, blood levels of tacrolimus and cyclosporin: Pink K 2 EDTA (chelator / anticoagulant) Blood typing and cross-matching, direct Coombs test, HIV viral load Royal blue ("navy") EDTA (chelator / anticoagulant) Trace elements, heavy metals, most drug levels, toxicology: Tan
Color returns results, on average, within 24–48 hours. [7] In August 2020, Color was running some of the highest-capacity test sites in the country. [8] Color was also responsible for the majority of San Francisco’s COVID-19 testing with an average turnaround time within 24 hours, [9] and most results returned in under 48 hours. [10]
A certificate of analysis can be associated with cannabis and cannabis-derived products, attesting to their laboratory analysis for cannabinoids, adulterants, heavy metals, pesticides, mold, etc. This gives consumers "an easy way to review test results from responsible companies selling cannabis and cannabis-infused products". [12]