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quantiferon tb evidence based medicine

Raja K Sivamani, Heidi Goodarzi, Miki Shirakawa Garcia, Siba P Raychaudhuri, Lisa N Wehrli, Yoko Ono, Emanual Maverakis
The treatment of psoriasis has undergone a revolution with the advent of biologic therapies including infliximab, etanercept, adalimumab, efalizumab, golimumab, certolizumab, alefacept, secukinumab, abatacept, and ustekinumab. These medications are designed to target specific components of the immune system and are a major technological advancement over traditional immunosuppressive medications. Herein, we present a comprehensive, unbiased comparison of these medications focusing on their differences. For example, TNF antagonists can differ in the way they are dissolved and administered, the effector molecules they can bind, serum peak and trough levels, the types of intracellular signals they can induce, the in vivo complexes that they can form, their protein structure, and their incidence and timing of rare adverse events, among other things...
April 2013: Clinical Reviews in Allergy & Immunology
Roland Diel, Robert Loddenkemper, Albert Nienhaus
Test accuracy of interferon-gamma release assays (IGRAs) for diagnosing TB differs when using older or precommercial tools and inconsistent diagnostic criteria. This metaanalysis critically appraises studies investigating sensitivity and specificity of the commercial T-Spot.TB and the QuantiFERON-TB Gold In-Tube Assay (QFT-IT) among definitely confirmed TB cases. We searched Medline, EMBASE, and Cochrane bibliographies of relevant articles. Sensitivities, specificities, and indeterminate rates were pooled using a fixed effect model...
April 2010: Chest
Kathleen Rowland, Richard Guthmann, Barbara Jamieson, Drew Malloy
Prior bacille Calmette-Guerin (BCG) vaccination increases the likelihood of a positive tuberculosis (TB) 5TU purified protein derivative (PPD) skin test. The PPD response following BCG vaccine varies with age at vaccination, number of years since the BCG vaccination, number of times vaccinated, and number of PPDs performed. An induration of greater than 14 mm is unlikely to be due to prior BCG vaccination (strength of recommendation [SOR]: A, based on meta-analysis of validation cohort studies). The variable reaction after BCG vaccination, along with the desire to detect all cases of TB, has led to recommendations that all patients with a positive PPD test be treated as true positives...
August 2006: Journal of Family Practice
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