Background: Norovirus is responsible for the viral gastroenteritis burden worldwide. Histo-blood type antigens (HBGAs) are the only well-known factor regarding their effect on the pathogenesis of norovirus. Here, we performed the study to further investigate the association of the ABO blood group with norovirus susceptibility.
Methods: All relevant studies were retrieved from PubMed, Embase, Web of Science, and Cochrane Library databases and the associations of ABO blood groups with norovirus were assessed. The pooled odds ratios (ORs) and 95% confidence interval (CI) were calculated from extracted data. I statistics, sensitivity analysis, and publication bias were used to confirm the findings. Subgroup analyses were performed for genotypes, publication years, development degree of the countries, and age if heterogeneity was recorded.
Results: Seventeen articles covering 2304 participants were included. The overall analysis of the studies showed similar ORs of norovirus infection among individuals with blood type A (OR = 0.90, 95%CI = 0.71-1.14, P = 0.37) and blood type B (OR = 0.85, 95%CI = 0.66-1.12, P = 0.25) as compared to those controls. An increased odds of norovirus infection was found among individuals with blood type O (OR = 1.28, 95%CI = 1.03-1.59, P = 0.03), while the individuals with blood type AB (OR = 0.91, 95%CI = 0.60-1.39, P = 0.67) showed no correlation with norovirus infection. For blood type B and blood type AB, the results of subgroup analyses mirrored the observations above.
Conclusions: The meta-analysis suggested that the blood type A, B and AB might not affect susceptibility to norovirus infection. However, blood type O appeared to be more susceptible to norovirus infection.
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