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Serodiagnosis of Lyme borreliosis: antibody titer and specificity in the IFT and western blot.

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Abstract

Out of 334 sera from healthy persons from northern Bavaria 6% reacted positive in the indirect immunofluorescence test (IFT, titre greater than or equal to 1:64). The percentage of positive cases in patients with erythema chronicum migrans (ECM), meningoradiculitis (M. Bannwarth), or acrodermatitis chronica atrophicans (ACA) was 43, 83 and 78%, respectively. In other patients with less characteristic symptoms in which an infection with B. burgdorferi was suspected the number of positive cases was only about 20%. A positive IgM-IFT was most often associated with ECM and M. Bannwarth; however, even in these cases IgM was only found in 30%. The serodiagnosis of
Lyme disease required simultaneous serum testing of T. pallidum antibodies (TPHA) to exclude a syphilis with cross-reacting antibodies. In cases with a positive B. burgdorferi-IFT and TPHA the final diagnosis of
Lyme disease was possible on the basis of Western blot analysis. The prominent antigens detected by sera from patients with
Lyme disease–but not with syphilis–had molecular weights of 18, 22, 41 and 60 K; IgM antibodies were mainly directed against the 22 K and 41 K antigens. The antigen pattern was not characteristic for different
disease stages.

Immun Infekt. 1989 Dec;17(6):189-94. English Abstract

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