Table 1.
Summary of influenza A virus screening of filtered surface water samples inoculated with paired cloacal and oropharyngeal swab samples collected from ducks prior to and following placement in wetlands in Alaska, Minnesota and Louisiana for a period of 125–229 days.
| wetland complex and field site | filtered water/swab samples (n=) | replicate #1 samples rRT-PCR+a (n=) | replicate #1 samples VI+b (n=) | date replicate #2 samples were submerged | replicate #2 sample recovery date | duration (days) replicate #2 samples were submerged in wetlands | replicate #2 samples rRT-PCR+ (n =) | replicate #2 samples VI+ (n=) |
|---|---|---|---|---|---|---|---|---|
| Izembek NWR, Alaska Bluebill Lake |
120 | 6 | 7 | 2 Sep–4 Oct 2018 | 14 Apr 2019 | 192–224 | 1 | 1 |
| Izembek NWR, Alaska Red Salmon Lake |
120 | 5 | 4 | 12 Sep–15 Oct 2018 | 14 Apr 2019 | 181–214 | 1 | 1 |
| Agassiz NWR, Minnesota Farmes Pool |
109 | 38 | 20 | 11 Sep 2018 | 28 Apr 2019 | 229 | 2 | 4 |
| Agassiz NWR, Minnesota Tamarack/Northwest Pool |
99 | 27 | 20 | 14–21 Sep 2018 | 28 Apr 2019 | 219–226 | 4 | 4 |
| Cameron Parish, Louisiana Private rice field |
118 | 4 | 0 | 16 Nov 2018 | 22 Mar 2019 | 126 | not tested | not tested |
| Cameron Parish, Louisiana Rockefeller Wildlife Refuge |
120 | 0 | 0 | 17 Nov 2018 | 22 Mar 2019 | 125 | not tested | not tested |
arRT-PCR positive (+).
bVirus isolation (VI) positive (+).