Table 1.
Swallow Bugs Collected Postexposure to Infectious Cliff Swallows
| Number of bugs tested | WNV positive (%) | DPEabugs removed from birds | DPE bugs sacrificed for testing | Average viral titer/bug (PFU/mL) |
|---|---|---|---|---|
| 45 | 20 | 3 | 3 | 102.8 |
| 35 | 14 | 5 | 5 | 102.2 |
| 20 | 0 | 1 | 17 | — |
| 15 | 0 | 1 | 24 | — |
| 15 | 0 | 1 | 31 | — |
| 499 | 0 | 37 | 148b | — |
Average WNV titer of cliff swallows at 0 DPE was 105.9 PFU/mL serum.
a
DPE to potentially infectious cliff swallows.
b
Bugs sent through a simulated winter period lasting 120 days.
DPE, days postexposure; PFU, plaque-forming units; WNV, West Nile virus.