Changing Patterns of H6 Influenza Viruses in Hong Kong Poultry Markets
Table 5
Experimental infection of quails and chickens.
Virus
Domestic poultry isolates
2001 isolates
Qa/HK/CSW106/01 (H6N1)
3.00
5.00
Ck/HK/SF4/01 (H6N1)
3.92
4.17
Sc/HK/AP46/01 (H6N2)
3.63
5.08
2002 isolates
Ph/HK/SSP44/02 (H6N1)
2.20
4.58
Qa/HK/YU404/02 (H6N1)
2.50
4.75
Gf/HK/SSP99/02 (H6N2)
3.23
4.73
2003 isolates
Ch/HK/CSW595/03 (H6N1)
2.73
4.73
Aquatic wild-bird isolates
2001 isolate
Dk/ST/5540/01 (H6N2)
2.6
6.48
2003 isolate
He/HK/LC10/03 (H6N8)
3.17
7.92
Reference strain
1997 isolate
Tl/HK/W312/97 (H6N1)
3.47
4.92
and indicate 50% quail and chicken infectious dose, respectively (/0.1 ml). Each titer was obtained from tracheal swabs of animals at 3-day postinoculation.