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A Population-Based Seroepidemiologic Study of Human Granulocytic Ehrlichiosis and Lyme Borreliosis on the West Coast of Sweden

J. Stephen Dumler, Leif Dotevall, Rolf Gustafson and Marta Granström
The Journal of Infectious Diseases
Vol. 175, No. 3 (Mar., 1997), pp. 720-722
Published by: Oxford University Press
Stable URL: http://www.jstor.org/stable/30130064
Page Count: 3
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A Population-Based Seroepidemiologic Study of Human Granulocytic Ehrlichiosis and Lyme Borreliosis on the West Coast of Sweden
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Abstract

Ehrlichioses are emerging infections in the United States. Human granulocytic ehrlichiosis (HGE) and Lyme borreliosis (LB) are acquired after Ixodes ricinuscomplex tick bites. An ongoing seroepidemiologic study of the 185 of the 356 permanent residents of the Koster Islands in Sweden was expanded to include ehrlichioses. Ehrlichial antibodies were measured by IFA using Ehrlichia equi and Ehrlichia chaffeensis. Borrelia burgdorferi IgG ELISA-seropositive subjects were confirmed by Western blot. E. equi and E. chaffeensis antibodies (titer ±80) were found in 21 (11.49%) and 2 (1.1%) of 185 samples, respectively. Antibodies to B. burgdorferi were found in 25 (13.5%) of 185. Six persons were seropositive for both HGE and LB. Among data from questionnaires, clinical symptoms, antibiotic treatments, or tick bites were not more frequent in E. equior B. burgdorferiseropositive than -seronegative persons. The seroprevalence of HGE was similar to that of Lyme borreliosis. Prospective studies of European HGE are needed.

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