The relationship between the frequency of the appearance of IgG against Helicobacter pylori and the main blood groups among patients with ulcer sickness and stomach cancer.

Among the 763 patients with ulcers and stomach cancer, including the control group of 586 blood donors, the search for a relationship between the spread of infection and the main blood groups was defined by the appearance of IgG against H. pylori in blood plasma (the ELISA test). The statistical analysis, however, did not prove that the frequency of the appearance of specific antibodies against H. pylori was statistically important in relation to the ABO blood groups.