CRP and bacterial infectious disease: On admission, the patient’s blood works showed leukocytosis of 16.9 G/l, C-reactive protein (CRP) of 13.6 mg/dl (reference value: ≤ 0.5 mg/dl), procalcitonin (PCT) of > 100 ng/ml (reference value: ≤ 0.1 ng/ml) and interleukin-6 (IL-6) of 41,902 pg/ml (reference value: ≤ 5.9 pg/ml), indicating a severe bacterial infection.