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Volume 9, Number 11—November 2003

Research

Rapid Antigen-Capture Assay To Detect West Nile Virus in Dead Corvids

Robbin Lindsay*Comments to Author , Ian Barker†, Gopi Nayar‡, Michael Drebot*, Sharon Calvin†, Cherie Scammell‡, Cheryl Sachvie‡, Tracy Scammell La Fleur‡, Antonia Dibernardo*, Maya Andonova*, and Harvey Artsob*
Author affiliations: *National Microbiology Laboratory, Health Canada, Winnipeg, Manitoba, Canada; †University of Guelph, Guelph, Ontario, Canada; ‡Manitoba Agriculture and Food, Winnipeg, Manitoba, Canada

Main Article

Table

Sensitivity and specificity of the VecTest assay to detect West Nile virus (WNV) in oropharyngeal and cloacal swabs collected from corvids in Ontario and Manitoba

Species tested (y) N Oropharyngeal swabs
Cloacal swabs
Sensitivity (%) Specificity
(%) Sensitivity
(%) Specificity
(%)
Ontario
American Crows (2001)
33
92.8
79
58.3
94.7
Blue Jays (2001)
28
60
100
40
100
American Crows (2002)
222
83.3
95.8
NDa
ND
Manitoba
American Crows
109b
83.9
93.6
83.1
97.9
Blue Jays
31c
71.4
100
57.1
100
Common Ravens
6b
100
100
100
0
Black-billed Magpies 4 0 100 66.7 100

aND, not done.
bCloacal swabs were not available from one bird in each of these groups of birds.
cAn oropharyngeal swab was not taken from one of the Blue Jays.

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