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Volume 9, Number 3—March 2003

Research

Experimental Infection of North American Birds with the New York 1999 Strain of West Nile Virus

Nicholas Komar*Comments to Author , Stanley Langevin*, Steven Hinten*, Nicole Nemeth*†, Eric Edwards*†, Danielle L. Hettler*†, Brent S. Davis*, Richard A. Bowen†, and Michel L. Bunning*‡
Author affiliations: *Centers for Disease Control and Prevention, Fort Collins, Colorado, USA; †Colorado State University, Fort Collins, Colorado, USA; ‡Office of the Surgeon General, United States Air Force, Bolling Air Force Base, Washington, D.C., USA

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Table 5

West Nile virus cage mate transmission trialsa

Species No.
of
cages No. of
mosquito-
exposed
birds No. of
contact
exposed
cage mates No. of
transmissions
(individuals) No. of
transmissions
(cages) Cage
transmission
rate
Mallard
1
2
1
0
0
0
Northern Bobwhite
1
3
3
0
0
0
Japanese Quail
1
3
3
0
0
0
American Coot
1
1
1
0
0
0
Ring-billed Gull
1
2
1
1
1
1.0
Mourning Dove
3
3
3
0
0
0
Rock Dove
6
6
6
0
0
0
Monk Parakeet
3
3
3
0
0
0
Budgerigar
3
3
3
0
0
0
Blue Jay
2
2
2
2
2
1.0
Black-billed Magpie
3
3
3
2
2
0.7
American Crow
4
8
5
5
4
1.0
Fish Crow
4
8
9
0
0
0
American Robin
1
2
1
0
0
0
European Starling
2
6
2
0
0
0
Common Grackle
6
6
6
0
0
0
House Finch
1
2
3
0
0
0
House Sparrow 2 6 5 0 0 0

aUninfected birds (contact-exposed group) were placed within cages containing birds (of the same species) that were infected by mosquito bite (mosquito-exposed group). Transmission to uninfected cage mates was determined by development of viremia or seroconversion.

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