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. 2020 Sep 9;287(1934):20201680. doi: 10.1098/rspb.2020.1680

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 (+).