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Pericardial TB patients have increased antigen-specific IFN-γ secretion in the pericardial fluid compared with blood. Undiluted blood and pericardial fluid were cultured overnight either unstimulated (NIL) or stimulated with ESAT-6 and CFP-10. IFN-γ concentration (ng/mL) was determined by ELISA and bars represent medians. Each circle is representative of one sample. P-Values indicate the differences between blood and pericardial fluid using the Wilcoxon-matched pairs test.
