Abstract
During the spring of 1996, an estimated 581,395 Ehrlichia-infected ticks were imported into Sweden by migrating birds. Ehrlichia gene sequences found in ticks collected from these migrating birds were identical to those of granulocytic ehrlichiosis found in domestic animals and humans in Sweden. These findings support the idea that birds may play a role in dispersing Ehrlichia.
Highlights
During the spring of 1996, an estimated 581,395 Ehrlichia-infected ticks were imported into Sweden by migrating birds
Cases of ehrlichiosis have been reported among humans in Scandinavia [2], and in Sweden, Ehrlichia have been detected in the tick Ixodes ricinus[3]
Several investigations in Europe and the Middle East have examined the role of birds as carriers of ticks infected with tick-associated arboviruses and the Lyme borreliosis agent, Borrelia burgdorferi sensu lato [7]
Summary
During the spring of 1996, an estimated 581,395 Ehrlichia-infected ticks were imported into Sweden by migrating birds. Cases of ehrlichiosis have been reported among humans in Scandinavia [2], and in Sweden, Ehrlichia have been detected in the tick Ixodes ricinus[3]. The Study Our investigation was designed to determine the frequency of Ehrlichia-infected ticks on migrating birds in Sweden and estimate the number of Ehrlichia-infected ticks being imported and exported by these birds.
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