TABLE 3.

Transmissibility and pathogenicity of A/Gs/HK/99 (H5N1) viruses in geese

Virus strainMethod of transmissionNo. of birds shedding/total no. of birds on day after infection:Sick/dead/totalb
357
TracheaCloacaTracheaCloacaTracheaCloaca
Gs/HK/437-4/99Inoculationa3/33/33/33/31/11/13/3/3 (7–8)
Contact1/22/22/22/20/10/12/1/2 (7)
Gs/HK/437-6/99Inoculation3/33/33/33/30/10/13/3/3 (6–9)
Contact2/21/22/22/20/20/22/0/2
Gs/HK/437-8/99Inoculation3/33/31/22/21/22/23/2/3 (3–8)
Contact2/22/22/22/22/20/22/0/2
Gs/HK/437-10/99Inoculation1/22/21/20/20/20/22/0/2
Contact2/22/22/22/20/20/22/0/2
Gs/HK/485-3/00Inoculation3/33/33/33/32/32/33/0/3
Contact0/20/21/21/21/21/22/1/2 (3)
Gs/HK/485-5/00Inoculation3/33/32/22/22/22/23/1/3 (5)
Contact1/21/22/22/22/22/22/0/2
  • a Geese were infected nasally, tracheally, and orally with 106.5 EID50 of virus in a volume of 1.0 ml.

  • b The geese were observed for 10 days after infection. Sick/dead/total, number of geese that were sick/number of geese that died/total number of geese. Numbers in parentheses are days on which birds died.