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. 2008 Oct 22;3(10):e3485. doi: 10.1371/journal.pone.0003485

Figure 2. Correlations between interferon-γ responses to PHA and various mycobacterial antigens.

Figure 2

N = number of infants who responded to both antigens considered. Rho: Spearman's rank correlation coefficient; IFN-γ: interferon-gamma; PHA: phytohaemagglutinin; PPD: purified protein derivative; Ag85: antigen 85; STCF: short term culture filtrate; KMTB: killed Mycobacterium tuberculosis.