TABLE 1.

Transmission of H9N2 viruses in quail and chickens

VirusNo. of positive tracheae/total no. of birds (log10 EID50/ml for each bird in the group)
QuailChickens
InoculatedaDirect contactAerosol contactFecal contactAerosol contactFecal contact
Dk/HK/448/783/3 (2.5, 2.5, 1.0)0/30/30/30/30/3
Dk/HK/702/793/3 (3.8, 2.5, 4.0)2/3 (2.8, 2.3)1/3 (3.8)1/3 (3.8)0/30/3
Qa/HK/A28945/883/3 (5.5, 5.5, 5.0)3/3 (5.5, 5.5, 1.5)3/3 (4.5, 5.0, 4.0)3/3 (5.5, 5.5, 1.3)0/33/3 (2.3, 2.0, 1.0)
  • a For inoculated quail, titers in parentheses correspond to each positive bird in the group 3 days after inoculation. For all other groups, titers in parentheses correspond to each positive bird in the group 5 to 7 days after inoculation.