Procalcitonin (PCT) is widely used as a diagnostic marker of sepsis and systemic inflammatory response syndrome (SIRS) [3] and has been shown to be a more accurate marker in detection of early postoperative infection after cardiac, intestinal and major neural surgeries compared to the standard laboratory parameters (such as CRP and WBC [1, 4–6]). The gene discussed is CRP; the disease is systemic inflammatory response syndrome.