The PCT (day1: 73.1 vs. 0.55, p = 0.003; day3: 20.34 vs. 1.35, p = 0.005)) and CRP (day1: 25.63 vs. 8.23, p = 0.007; day3: 25.58 vs. 10.71, p < 0.001) levels were also significantly different between the SIRS and non-SIRS groups on the 5th day after admission. The gene discussed is CRP; the disease is systemic inflammatory response syndrome.