A 23-year-old patient with acute pulpitis has elevated body temperature and an increase in the WBC count up to 14 × 109/l. The leucogram is as follows: basophils - 0, eosinophils - 2, monocytes - 0, immature neutrophils - 4, stab neutrophils - 8, segmented neutrophils - 56, lymphocytes - 26, monocytes - 4. How can we interpret these changes in the white blood cells?