During a TB skin test, the testing solution is injected under the skin of the forearm, which creates an elevated, swollen spot on the surface of the skin. After 48 to 72 hours, a health professional reads the results of a TB skin test by measuring the size of the elevated spot. To i...
However, no test is completely foolproof. Factors like recent TB exposure, immune system status, and laboratory procedures can influence the results. Always discuss your results with your healthcare provider for accurate interpretation.What Should I Do If I Test Positive for TB?If you receive a ...
All authors contributed to the interpretation of results, read and approved the final manuscript. Rights and permissions This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://...
Fig. 1. TB testing algorithm and interpretation using AFB and NAAT results [54]. AFB and NAAT has faster turn-around time compared to bacterial culture. These two tests can be used to guide the management of patients suspected of having TB based on clinical symptoms and chest x-ray abnormal...
The result is expressed in terms of millimeters of induration but its interpretation is complex and depends on many variables that may influence not only the size of the reaction but also the development of false negative and false positive results, especially in cases that have been previously ...
sometimes transmission effects and the potential for reinfection withM. tuberculosismay have a bearing on the interpretation of results from individual-level trials. Modelling has been particularly influential in investigating the potential for impact from innovative strategies that have not yet been trial...
Neither tuberculin skin testing nor IGRA testing is sufficiently sensitive to rule out TB infection.[69] Approximately 20% of patients with active TB, particularly those with advanced disease, have normal PPD test results. In addition, caution is recommended on the interpretation of these tests in...
Suspect the diagnosis based on symptoms, risk factors, tuberculin skin testing, and interferon-gamma release assays; confirm by sputum testing (microscopic examination and culture) and/or nucleic acid amplification tests. Treat with multiple drugs for several months. ...
Interpretation of Mycobacterium tuberculosis antigen-specific IFN-gamma release assays (T-SPOT.TB) and factors that may modulate test results. BackgroundData about T cell antigen-specific (ESAT-6 and CFP-10) IFN-γ release assays (IGRAs) during and after completion of anti-tuberculous (TB) treat...
INTERPRETATION OF RESULTS 1.Negative:One pink band appears in the control region (C), no band in test region (T). This indicates that there is no detectable TB antibody in the specimen. 2.Positive:One pink band in each control & test region, indicates positive result. ...