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Volume 10, Number 12—December 2004


Differential Virulence of West Nile Strains for American Crows

Aaron C. Brault*†Comments to Author , Stanley A. Langevin*, Richard A. Bowen‡, Nicholas A. Panella*, Brad J. Biggerstaff*, Barry R. Miller*, and Nicholas Komar*
Author affiliations: *Centers for Disease Control and Prevention, Fort Collins, Colorado, USA; †University of California, Davis, California, USA; ‡Colorado State University, Fort Collins, Colorado, USA

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Table 1

West Nile viral strains used for virulence studies in American Crows

Virus Strain Source Passage historya Location Genetic lineageb
NY99 NY99-4132 American Crow (brain) V1 USA I
KEN KEN-3829 Culex univittatus V2 Kenya I
Kunjin (KUN) KUN-6453 Cx. annulirostris V1, BHK1 Australia I

aViruses were propagated in Vero (V) or baby hamster kidney (BHK) cells. Numbers following passage source represent the number of viral passages.
bGenetic lineages as reported previously (9).

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