Volume 8, Number 4—April 2002
Research
Experimental Infection of Horses with West Nile virus
Table 2
Postinfection levels of West Nile viremia in horses, May–July 2000a
Day | Viremia levels (Log-10 Vero cell PFU/mL serum) |
|||||||
---|---|---|---|---|---|---|---|---|
Horse |
||||||||
9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | |
1 (a.m.) | 1.3 | - | - | - | - | - | - | - |
1 (p.m.) | - | 1.0 | - | - | - | - | - | - |
2 (a.m.) | - | 1.3 | - | - | - | - | - | - |
2 (p.m.) | - | 1.0 | - | 1.0 | - | - | - | 1.0 |
3 (a.m.) | 2.1 | 1.5 | 1.0 | - | 1.0 | - | 2.2 | - |
3 (p.m.) | 2.3 | 1.3 | - | - | 3.0 | - | - | 1.9 |
4 (a.m.) | 2.4 | 1.6 | 2.5 | 1.5 | 1.3 | - | 1.3 | 2.1 |
4 (p.m.) | 1.9 | 1.5 | 1.9 | 1.0 | 1.3 | - | - | 2.0 |
5 (a.m.) | 1.6 | 1.5 | 2.7 | 1.0 | 1.3 | - | - | 2.5 |
5 (p.m.) | - | 1.6 | 2.5 | - | 1.3 | - | - | 2.7 |
6 (a.m.) | - | 1.6 | 2.1 | - | - | - | - | 2.3 |
6 (p.m.) | - | 1.6 | 2.1 | - | - | - | - | 2.0 |
aHorses 9 to 12 were infected by bites of mosquitoes inoculated 12 days earlier with WN virus strain isolated from a horse; horses 13 to 16 similarly infected with strain isolated from a crow; dash indicates viremia level was too low to be detectable or was absent.