Figure 3From: Latent Tuberculosis in HIV positive, diagnosed by the M. Tuberculosis Specific Interferon-γ testIFN-γ release (IU/mL) after stimulation of whole blood with PHA (mitogen). Results are stratified into intervals according to the CD4-cell count for each individual. The median IFN-γ values within each CD4-cell count interval are indicated with horizontal lines. Cut off for PHA response of 0.5 IU/ml is shown by a dotted line.Back to article page