American Journal of Epidemiology Vol. 143, No. 11: 1157-1164
Copyright © 1996 by The Johns Hopkins University School of Hygiene and Public Health
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Seroprevalence of Immunoglobulin G, M, and A Antibodies to Helicobacter pylori in an Unselected Danish Population
1Department of Clinical Microbiology, Rigshospitalet, National University Hospital Copenhagen, Denmark
2Department of Clinical Microbiology, Hillerød Hospital Hillerød, Denmark
3The Glostrup Population Studies, Department of Internal Medicine C, Glostrup Hospital, University of Copenhagen Denmark
4Department of Surgery K, Bispebjerg Hospital, University of Copenhagen Copenhagen, Denmark
5Department of Gastroenterology B, Fredenksberg Hosprtal, University of Copenhagen Frederiksberg, Denmark
Reprint requests to Dr. Steffen Rosenstock, Department of Surgery K, Bispebjerg Hospital, Bispebjerg Bakke 23, 2400 NV, Copenhagen, Denmark.
The seroprevalences of increased levels of immunoglobulin G (IgG), M (IgM), and A (IgA) antibodies to Helicobacter pylori were assessed by enzyme-linked immunosorbent assay techniques in 3, 589 Danes who participated in a population study in Copenhagen County in 1982. A total of 33.9% of the study population had one or more classes of increased antibodies to H. pylori. Increased levels of IgG, IgM, and IgA antibodies to H. pylori were seen in 25.9% (95% confidence interval (CO 24.527.3), 4.5% (95% Cl 2.27.0), and 12.0% (95% Cl 10.913.1) of the participants, respectively. Women were significantly more likely than men to be seropositive for IgM antibodies (Mantel-Haenszel summary odds ratio = 1.85, 95% Cl 1.342.57). Sero-positivrty for IgM antibodies to H. pylori was found less often with increasing age. An IgG antibody response was not seen in 23.7% of cases with overall increased antibodies to H. pylon. Increased levels of IgG or IgA antibodies were more frequent in people with a history of peptic ulcer disease. Seroprevalences of increased H. pylori antibodies are high in unselected populations. Primary H. pylori infections are contracted at all ages, but infection rates decline with age. Inclusion of measurements of IgA and IgM antibody levels in future screening for H. pylori may improve the diagnostic sensitivity of serologic analyses. Am J Epidemiol 1996; 143: 115764.
Helicobacter pylori; immunoglobulins; peptic ulcer; prevalence; seroepidemiologic methods
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