IFN-γ secretion by PBMC from 3 PPD+ healthy donors in the presence of synthetic 20-mer peptides and rPPE44 (positive control), as determined by ELISpot. Individual responses to the peptides are indicated as solid, grey and empty bars. Results are expressed as in Fig. 1A.
Cuccu et al. BMC Microbiology 2011 11:167 doi:10.1186/1471-2180-11-167