Volume 10, Number 12—December 2004
Research
Differential Virulence of West Nile Strains for American Crows
Table 4
Cross-neutralization immune response of American Crows 24 days postinfection (dpi) with either KEN or KUN virusesa
Sample no. | Inoculation | NY99 | KEN | KUN | Difference |
---|---|---|---|---|---|
Crow 8 | KEN | 640b | 640c | NT | 0 |
Crow 1 | KUN | 160 | NTd | 320 | 2-fold |
Crow 2 | KUN | 320 | NT | 320 | 0 |
Crow 3 | KUN | 160 | NT | 160 | 0 |
Crow-4 | KUN | 160 | NT | 320 | 2-fold |
Crow 5 | KUN | 160 | NT | 160 | 0 |
Crow 6 | KUN | 320 | NT | 320 | 0 |
Crow-7 | KUN | 640 | NT | 640 | 0 |
Crow 8 | KUN | 640 | NT | 640 | 0 |
aFollowing secondary NY99 challenge at 14 dpi.
bValues represent the greatest reciprocal dilution in which >90% plaque inhibition was achieved as compared to sera-negative control cultures.
cHomologous titers are depicted in bold print.
dNT, not tested; KEN, West Nile virus strain from Kenya; KUN (Kunjin), West Nile virus strain from Australia.