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  • Title: Seroprevalence of antibodies to Borrelia burgdorferi sensu lato in healthy adults from western Norway: risk factors and methodological aspects.
    Author: Hjetland R, Nilsen RM, Grude N, Ulvestad E.
    Journal: APMIS; 2014 Nov; 122(11):1114-24. PubMed ID: 24730472.
    Abstract:
    The aim of this study was to assess the seroprevalence of antibodies to Borrelia burgdorferi sensu lato in a healthy adult population from Sogn and Fjordane county in western Norway by different assays. Sera from 1213 blood donors at four different blood banks were analysed in Enzygnost Lyme link VlsE/IgG (IgG), Enzygnost Borreliosis IgM (IgM), and Immunetics C6 Lyme ELISA kit (C6). Sera showing positive or grey-zone reactivities were further examined with Borrelia-EUROLine-RN-AT IgG blot and Borrelia-EUROLine-RN-AT IgM blot. The seroprevalences were 9.6%, 8.2%, 8.4%, 6.4% and 5.7%, respectively. The seroprevalence for IgG was lower in the eastern part of the county and in owners of pet animals. It was higher in men, and increased with age and number of tick bites. C6 and IgG gave comparable results. IgM only was found in 4.5%, more often in women, did not increase with age, and showed no relationship with geography, and 56.4% were positive in IgM blot. In conclusion, antibodies to B. burgdorferi s.l. are common in blood donors in western Norway. The results may be used for evaluation of predictive values of test results in patients, as well as a basis for test algorithms in the laboratory.
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