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. 2007 Aug;13(8):1215-8.
doi: 10.3201/eid1308.061416.

Migrating birds and tickborne encephalitis virus

Jonas Waldenström  1 , Ake Lundkvist, Kerstin I Falk, Ulf Garpmo, Sven Bergström, Gunnel Lindegren, Anders Sjöstedt, Hans Mejlon, Thord Fransson, Paul D Haemig, Björn Olsen
Affiliations

Migrating birds and tickborne encephalitis virus

Jonas Waldenström et al. Emerg Infect Dis. 2007 Aug.

Abstract

During spring and autumn 2001, we screened 13,260 migrating birds at Ottenby Bird Observatory, Sweden, and found 3.4% were infested with ticks. Four birds, each a different passerine species, carried tickborne encephalitis virus (TBEV)-infected ticks (Ixodes ricinus). Migrating birds may play a role in the geographic dispersal of TBEV-infected ticks.

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Figures

Figure
Figure
Autumn migration directions (arrows) of tree pipits (Anthus trivialis), robins (Erithacus rubecula), redstarts (Phoenicurus phoenicurus), and song thrushes (Turdus philomelos) banded in southeastern Sweden (area indicated by a square) and recovered within 60 days. Directions: Tree pipit, 203.6º, mean vector length = 0.993, n = 10; robin, 220.5º, mean vector length = 0.928, n = 293; redstart, 225.9º, mean vector length = 0.975, n = 52; and song thrush, 218.8º, mean vector length = 0.947, n = 117. Recovery sites of birds banded in southeastern Sweden and reported from areas north of the banding sites in a following year are also shown as indicated in the legend (no recovery from breeding areas is available for tree pipit).
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