The NOS3 (rs1799983) G allele and the FCGR2A (rs1801274) G allele were positively correlated with the occurrence of bacterial infections in patients; β = 1.96, OR = 7.12, p value = 0.0212; and β = 1.68, OR = 5.4, p value= 0.014, respectively. The gene discussed is NOS3; the disease is bacterial infectious disease.