Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Tree squirrels tested for West Nile virus by RT-PCR in California, 2004–2005*
| Species | No. tested | No. positive | Prevalence, %† |
|---|---|---|---|
| Fox squirrel (Sciurus niger) | 140 | 68 | 48.6 |
| Western gray squirrel (Sciurus griseus) | 64 | 25 | 39.1 |
| Eastern gray squirrel (Sciurus carolinensis) | 17 | 3 | 17.7 |
| Unknown species | 11 | 1 | 9.1 |
| Total | 232 | 97 | 41.8 |
RT-PCR = reverse transcription–polymerase chain reaction.
Prevalence calculated as no. positive/no. tested × 100.
