Our results also show that the AUROC curve for a model containing the donor rs6876739 genotype provides significantly better predictive ability than a model without the donor rs6876739 genotype (0.912 vs. 0.835, P < 0.001), suggesting that the C7 rs6876739 (C allele) improves the value of this model for predicting the risk of bacterial infection in recipients after LT. This evidence concerns the gene C7 and bacterial infectious disease.