As shown in Table 2, prevalence of CMV-UL93 and anti-CMV IgG were significantly higher in IBD patients, than in healthy controls (84.07% vs 59.66%, P < 0.001; 76.11% vs 50.69%, P < 0.001), However, prevalence of anti-CMV IgM was no different with healthy controls (1.77% vs 0.34%, P = 0.235). The gene discussed is CD40LG; the disease is inflammatory bowel disease.