Fig. 4From: Monitoring the immune response of macrophages in tuberculous granuloma through the expression of CD68, iNOS and HLA-DR in naturally infected beef cattleCD68+ Cells. The CD68+ immunolabeling fraction was higher in the early-stage granulomas compared with the late stages, with a significant difference between stage II and stages III and stage IV (** = P < 0.003)Back to article page