In the laboratory test, higher level of white blood cells (WBCs: (10.38 ± 4.56) × 109/L vs (6.45 ± 1.95) × 109/L, p < 0.001), C-reactive protein (CRP: (138.93 ± 73.03) mg/L vs (40.28 ± 30.38) mg/L, p < 0.001), Creatine ((88.27 ± 35.16) mmol/L vs (63.31 ± 14.50) mmol/L, p < 0.001), and a lower level of platelet ((152.93 ± 51.93) × 109/L vs (229.65 ± 66.59) × 109/L, p < 0.001) were detected on patients with leptospirosis. This evidence concerns the gene CRP and leptospirosis.