Volume 16, Number 3—March 2010
Research
Surveillance for West Nile Virus in American White Pelicans, Montana, USA, 2006–2007
Gregory P. Johnson
, Nicole M. Nemeth, Kristina Hale, Nicole P. Lindsey, Nicholas A. Panella, and Nicholas Komar
, Nicole M. Nemeth, Kristina Hale, Nicole P. Lindsey, Nicholas A. Panella, and Nicholas Komar
Table 4
Virus titers of field-collected samples from WNV-positive American white pelican chicks and test agreement with carcass-matched specimens, Montana, USA, 2006–2007*
| Sample | No. (%) WNV positive, n = 19 | Median viral titer, log PFU/0.5 cm3 (range) | κ |
|---|---|---|---|
| Skin† | 15 (88.2) | 3.6 (1.7–5.0) | 0.88 |
| Feather pulp | 15 (78.9) | 4.9 (1.3–5.6) | 0.84 |
| Oral swab | 7 (36.8) | 1.2 (0.7–2.1) | 0.79 |
| Cloacal swab | 4 (21.1) | 1.5 (0.7–2.7) | 0.79 |
*WNV, West Nile virus; κ, concordance. All carcasses were positive for WNV infection by virus isolation or detection of specific WNV RNA by reverse transcription–PCR. Only plaque assay results are presented for field-collected samples.
†Skin was collected from only 17 carcasses in the field.
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