Clinical and pathologic responses of American crows (Corvus brachyrhynchos) and fish crows
Poor sensitivity occurred in most raptors, Mourning Doves (Zenaida macroura), Fish Crows
(Corvus ossifragus), and American Robins (Turdus migratorius).
A DNA vaccine for West Nile virus (WNV) was evaluated to determine whether its use could protect fish crows
(Corvus ossifragus) from fatal WNV infection.
Four birds sustained detectable viremias of 7 days (a Ring-billed Gull, a House Finch, and two Fish Crows
We collected postmortem specimens from 20 corvids, including 12 American Crows (Corvus brachyrhynchos), 4 Fish Crows
(Corvus ossifragus), and 4 Blue Jays (Cyanocitta cristata), that had died (or in one case had been euthanized after becoming moribund) after experimental infection with the New York 1999 strain of WNV.
However, WN virus was isolated from dead birds of 19 other species, including the Fish Crow
on necropsy Jan 1 - Jul 19 American Crow(d) 29 (51.8) 27 Blue Jay 7 (25) 21 Fish Crow
0 (--) 2 American Robin 0 (--) 0 House Sparrow 0 (--) 1 Other species 2 (25) 6 Total(e) 38 (40) (PPV=27.9%) 57 Jul 20 - Dec 31 American Crow(d) 624 (79.0) 166 Blue Jay 76 (61.3) 48 Fish Crow
16 (84.2) 3 American Robin 7 (43.8) 9 House Sparrow 3 (18.8) 13 Other species 68 (33.5) 135 Total(e) 794 (68.0) (PPV=55.1%) 374 Total (all year) 832 (65.8%) 431 No.
In the other three NYC boroughs with one or two human cases, WN virus-positive birds (American Crows in Queens and Manhattan and a Fish Crow
in Brooklyn) were found, and dead crow densities increased before the dates of onset of human case (Figures 2B-D), with a maximum weekly dead crow density in Manhattan of 1.25 the week after the date of onset of the human case (Figure 2D).
Avian species that were [is greater than] 35% positive and for which at least 10 birds were tested included American Kestrel (57%, n=14), Cedar Waxwing (60%, n=10), Ovenbird (50%, n=18), American Crow (47%, n=1,687), Fish Crow
(47%, n=45), and Red-tailed Hawk (43%, n=14).
Of the 4,305 reported WN virus-infected birds, 3,824 (88.8%) were Corvus species (American Crow, Fish Crow
Host-range restriction of chimeric yellow fever-West Nile vaccine in fish crows
West Nile virus antibody prevalence in American crows (Corvus brachyrhynchos) and fish crows
(Corvus ossafragus) in Georgia, U.S.A.