Volume 13, Number 6—June 2007
Research
West Nile Virus Viremia in Eastern Chipmunks (Tamias striatus) Sufficient for Infecting Different Mosquitoes
Kenneth B. Platt*
, Bradley J. Tucker*, Patrick G. Halbur*, Sonthaya Tiawsirisup†, Bradley J. Blitvich*, Flor G. Fabiosa*, Lyric C. Bartholomay*, and Wayne A. Rowley*
, Bradley J. Tucker*, Patrick G. Halbur*, Sonthaya Tiawsirisup†, Bradley J. Blitvich*, Flor G. Fabiosa*, Lyric C. Bartholomay*, and Wayne A. Rowley*
Table 2
Infection rates of Aedes triseriatus (Say), Ae. vexans (Meigen), and Culex pipiens (L.) after feeding on viremic eastern chipmunks (Tamias striatus) infected with West Nile virus (WNV)
| WNV serum titer* | Ae. triseriatus |
Ae. vexans |
Cx. pipiens |
|||
|---|---|---|---|---|---|---|
| No. blood meals† | % Positive (no. blood-fed) | No. blood meals | % Positive (no. blood-fed) | No. blood meals | % Positive (no. blood-fed) | |
| 3.1–4.4 | 3 | 0 (27) | 2 | 0 (10) | 2 | 0 (6) |
| 4.8 | 2 | 0 (19) | 1 | 0 (1) | 1 | 0 (1) |
| 5.6–5.8 | 2 | 23 (13) | 2 | 0 (4) | 1 | 0 (1) |
| 6.0–6.9 | 5 | 0 (14) | 3 | 15 (13) | 2 | 50 (2) |
| 7.2–7.8 | 2 | 25 (12) | 2 | 40 (5) | ND‡ | |
*Log10, PFU of WNV.
†No. chipmunks providing blood meals.
‡ND, not done.
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