[Isolation of H. pylori proteins and support for their suitability in serologic diagnoses]

H.pylori-proteins were separated using gel chromatographic methods. These antigens were tested for their suitability to detect H.pylori-specific antibodies. A complex of two proteins (62 kDa and 30 kDa) was a strong and specific antigen. A third protein (13 kDa) was a good but nonspecific antigen. Concerning these facts we compared two often used antigen preparations for serodiagnosing H.pylori-specific antibodies (acid-glycine preparation and sarcosyl-insoluble outer membrane proteins). The sarcosyl-insoluble material contains more specific antigens and lower levels of nonspecific proteins compared to the acid-glycine preparation. Based on these results we conclude that the outer membrane preparation seems to be more suitable for the serodiagnosing of H.pylori-specific antibodies.