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Volume 6, Number 2—April 2000

Research

Competence of American Robins as Reservoir Hosts for Lyme Disease Spirochetes

Dania Richter*†Comments to Author , Andrew Spielman*, Nicholas Komar*, and Franz-Rainer Matuschka*†
Author affiliations: *Harvard School of Public Health, Boston, Massachusetts, USA; and †Charité, Medizinische Fakultät der Humboldt-Universität zu Berlin, Germany

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Table 1

Infectivity to larval deer ticks of four American robins infected with tickborne Lyme disease spirochetes

Xenodiagnostic ticks
Days from exposure until xenodiagnosisa No.examined %infected ± SEb
0-5 16 0 0
6-9 28 28.6 16.5
12-15 52 84.6 7.0
20-23 78 85.9 6.0
28-30 62 91.9 6.7
39-41 50 68.0 20.3
79-82 65 13.8 10.2
189-191c 32 0 0
199-201 80 75.0 15.2

aEach interval indicates the days on which xenodiagnostic ticks detached from their hosts.
bSE = standard error
cBirds were exposed again to infected nymphal ticks on day 186.

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