The hemoglobin (Hb) level in the mixed bacterial-fungal infection group was significantly higher than that in the non-infection group (141 vs. 138 g/L, P = 0.040), and its CHE level showed the most significant decrease (5191 vs. 5935.32 U/L, P<0.001), while the decrease in the fungal infection group was relatively the mildest (5935 U/L vs. 5935.32 U/L, P = 0.018). The gene discussed is GSTM1; the disease is infection.