Table II.
Survival of vaccinated birds after heterologous challenges*.
Challenge Strain** | Challenge Subtype | Total Birds | Dead | Dead | Survived | Survival |
---|---|---|---|---|---|---|
DPI: 2 | DPI: 3 | DPI: 14 | ||||
Vacc/Ck/NJ | H9 LPAI | 10 | 10 | 10/10 | ||
Vacc/Jalisco | H7 | 10 | 10 | 10/10 | ||
Vacc/Tk/MN15 | H5 | 10 | 10 | 10/10 | ||
Sham-Ck/NJ | H9 LPAI | 10 | 10 | 10/10 | ||
Sham-Jalisco | H7 | 10 | 7 | 3 | 0 | 0/10 |
Sham-Tk/MN15 | H5 | 10 | 8 | 2 | 0 | 0/10 |
DPI, days post infection; LPAI, low pathogenicity avian influenza.
Strains included into H5/H7/H9/N1/gag VLP vaccines were the following: A/chicken/West Java Sbg/29/2007 (H5N1), A/turkey/Oregon/1971 (H7N3) and A/turkey/Wisconsin/1/1966 (H9N2).
Challenge strains were the following: A/turkey/Minnesota/7172-1/2015 (H5N2), A/chicken/Jalisco/CPA1/2012 (H7N3) and A/chicken/New Jersey/12220/1997 (H9N2).