Figure 5From: GM-CSF and IL-2 as adjuvant enhance the immune effect of protein vaccine against foot-and-mouth diseaseDTH of Guinea pig inoculated with different proteins. Fourteen days after the last inoculation, all Guinea pigs (N = 7) were challenged counter-laterally with the 146 S antigen on right footpads as test and saline on left footpads as the negative control. The DTH was defined as the thickness ratio of the right footpad to the left footpad at 24 h, 36 h and 48 h after the challenges.Back to article page