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Volume 29, Number 10—October 2023
Dispatch

Limited Outbreak of Highly Pathogenic Influenza A(H5N1) in Herring Gull Colony, Canada, 2022

Liam U. TaylorComments to Author , Robert A. Ronconi, Hayley A. Spina, Megan E.B. Jones, C. Brandon Ogbunugafor, and Andrea J. Ayala
Author affiliations: Yale University, New Haven, Connecticut, USA (L.U. Taylor, C.B. Ogbunugafor, A.J. Ayala); Canadian Wildlife Service, Dartmouth, Nova Scotia, Canada (R.A. Ronconi); Environment and Climate Change Canada, Dartmouth (R.A. Ronconi); University of Guelph, Guelph, Ontario, Canada (H.A. Spina); University of Prince Edward Island, Charlottetown, Prince Edward Island, Canada (M.E.B. Jones); Canadian Wildlife Health Cooperative, Charlottetown (M.E.B. Jones)

Main Article

Table 2

Putative highly pathogenic influenza A(H5N1) virus cases in herring gulls on East Beach and West Beach study areas in study of limited outbreak on Kent Island, Canada, 2022*

Case no.
 Location
 Age,† y
 First seen sick
Last seen alive
Found dead
Date
 Time
 Date
 Time
 Date
 Time
1 East Beach >4 Jun 27 ≈09:30 Jun 27 ≈09:30 Jun 27 ≈16:30
2 East Beach >4 NA NA NA NA Jun 28 ≈17:00
6 East Beach >4 Jul 2 12:11 Jul 2 12:11 Jul 3 09:38
8 East Beach >4 Jul 3 09:49 Jul 5 13:22 Jul 5 17:52
11 East Beach >4 Jul 3 20:30 Jul 3 20:30 Jul 4 08:57
12 East Beach >4 Jul 4 09:14 Jul 4 14:10 Jul 5 08:46
15 East Beach >4 Jul 4 13:51 Jul 4 17:09 Missing NA
16 East Beach >4 Jul 4 14:21 Jul 5 13:22 Jul 6 12:01
18 East Beach 4 NA NA NA NA Jul 4 17:13
20 East Beach >4 Jul 5 08:51 Jul 6 16:46 Jul 6 19:39
24 East Beach >4 Jul 5 17:45 Jul 5 18:18 Jul 6 11:34
26 East Beach >4 Jul 5 17:10 Jul 6 11:36 Missing NA
27 East Beach 4 Jul 6 11:54 Jul 6 19:53 Recovered? NA
28 East Beach >4 NA NA NA NA Jul 6 11:58
31 East Beach >4 Jul 8 16:23 Jul 8 16:23 Jul 8 19:50
32 East Beach >4 Jul 10 16:30 Jul 10 19:45 Jul 11 16:42
33 East Beach >4 NA NA NA NA Jul 15 16:06
34 East Beach >4 NA NA NA NA Jul 17 16:25
35 East Beach >4 NA NA NA NA Jul 19 16:30
36 East Beach >4 Jul 21 07:39 Jul 21 16:26 Jul 22 09:46
37 East Beach >4 Jul 25 13:45 Jul 25 13:45 Jul 26 10:28
38‡ East Beach >4 Jul 26 10:25 Jul 26 10:25 Jul 29 08:36
39 East Beach 1 NA NA NA NA Aug 8 10:13
40 East Beach 1 NA NA NA NA Aug 12 08:13
NA East Beach NA NA NA NA NA Sep 2 NA
4 West Beach 4 NA NA NA NA Jul 1 11:45
5 West Beach >4 Jul 1 16:18 Jul 1 16:18 Jul 1 17:20
9 West Beach >4 Jul 3 16:41 Jul 3 16:41 Jul 4 10:20
10 West Beach >4 Jul 3 16:43 Jul 3 16:43 Jul 4 10:25
13 West Beach >4 Jul 4 10:04 Jul 4 10:04 Jul 4 14:49
14 West Beach >4 NA NA NA NA Jul 4 10:11
19 West Beach >4 NA NA NA NA Jul 5 09:46
22 West Beach >4 NA NA NA NA Jul 5 17:15
25 West Beach >4 NA NA NA NA Jul 5 16:20
NA West Beach >4 NA NA NA NA Jul 7 NA
NA West Beach >4 NA NA NA NA Jul 7 NA
NA West Beach >4 NA NA NA NA Jul 23 NA
NA West Beach NA NA NA NA NA Sep 2 NA
NA West Beach NA NA NA NA NA Sep 2 NA
NA West Beach NA NA NA NA NA Sep 2 NA

*Case details are provided in the Appendix. Some carcasses were not numbered. NA, not applicable. †Estimated according to plumage (8) when noted. ‡Carcass was not discovered until what appeared to be several days after death.

Main Article

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