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Informative Value of the Prevalence of Antiborrelia Antibodies in the Healthy andRisk Population


Authors: P. Bartůněk 1;  V. Mrázek 2;  P. Vařejka 2;  T. Sklenář 1;  R. Bína 1;  S. Lištvanová 1;  Janovská D . 3
Authors‘ workplace: IV. interní klinika, Všeobecná fakultní nemocnice a 1. lékařská fakulta Univerzity Karlovy, Praha, 2 II. interní klinika, Všeobecná fakultní nemocnice a 1. lékařská fakulta Univerzity Karlovy, Praha, 3 Oddělení epidemiologie, Centrum preventivního lékařst 1
Published in: Epidemiol. Mikrobiol. Imunol. , 2000, č. 1, s. 4-10
Category:

Overview

The authors tried to confirm data on the prevalence of antiborrelia antibodies class IgM and IgG inthe local healthy population (200 blood donors) and in subjects with an increased risk of infection(forestry labourers, forestry workers and huntsmen). All blood samples were analyzed in theNational Reference Laboratory for Lyme borreliosis CEM (LB) in the National Institute of PublicHealth in Prague by the ELISA NRLB KC 90 method and in case of a positive result they wereconfirmed by the Western blot Lyme method. All patients completed a special questionnaire usedas a standard procedure in the consultation centre for LB.In the group of blood donors 100 men were examined, mean age 33.5 years and 100 women, meanage 24.4 years. In 26 positive antibodies against Borrelia burgdorferi (Bb) were confirmed, but oninvitation to medical examination only 22 attended, 11 men and 11 women (10.1%). Examination ofantiborrelia antibodies by the ELISA method proved positivity of class IgM 7 times and of class IgG9 times. By the Western blot method (WB) class IgG was confirmed three times.In the risk group 39 men were examined, mean age 40.6 years and 32 women. In 12 of them (17.9%)positivity of antiborrelia antibodies against Borrelia burgdorferi (Bb) was proved by the ELISAmethod as well as the WB method. If the percentage confidence interval of the control group is taken as a basis for comparison, thenthe value of the risk group is within this interval at a significance value of alpha = 0.01.In the conclusion the authors discuss the problem of interpretation of positive serological resultsand the pitfalls of their evaluation not only from the aspect of validity of laboratory findings, dueto the absence of standardization of methods, but also with regards to obscure aspects of thepersistance of IgM antibodies after years of lege artis antibiotic treatment.

Key words:
Lyme borreliosis – prevalence – antiborrelia antibodies – ELISA Lyme – Western blotLyme.

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Hygiene and epidemiology Medical virology Clinical microbiology
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