Clinical outcome and virus isolation data of wood ducks (Aix sponsa) challengeda with the highly pathogenic avian influenza virus A/whooper swan/Mongolia/244/05 (H5N1).

aBirds were challenged via choanal cleft with a dose of 104EID50 of A/whooper swan/Mongolia/244/05 (H5N1), 21 days after experimental pre-exposure to different subtypes of LPAI viruses.bFive out of 13 birds that succumbed and six out of 12 birds that survived had pre-existing antibodies against avian influenza.cAbbreviation: HPAIV-dpc = days post H5N1 HPAI challenge; OP = oropharyngeal swab; CLO = cloacal swab; NA = non applicable; * = not tested.dno. of birds that shed the virus/total.eOnly birds that died were tested. Therefore, 4/12 birds were tested at 5 HPAIV-dpc, and 6/8 were tested at 6 HPAIV-dpc.