Table 7.

Transmission of A/HK/1073/99 (H9N2) among quail

Day after contactNo. infected (virus titer [log10/ml])
Infected quailaPhysical contactbFecal contactcAerosol contactd
TracheaCloacaTracheaCloacaTracheaCloacaTracheaCloaca
22 (2.8)0 (<e)2 (4.8)0 4 (4.8)0 0 0 
42 (2.8)0 (<)2 (NTf)2 (<1.0)4 (NT)1 (<1.0)2 (4.5)0 
62 (4.5)0 (<)2 (4.5)0 (<)4 (4.5)1 (<1.0)4 (2.0)0 
92 (<1.0)0 (<)2 (2.0)2 (<1.0)4 (2.5)0 4 (2.0)3 (<1.0)
110 0 0 0 0 0 0 0 
  • a Two quail were infected with A/HK/1073/99 (H9N2).

  • b The two infected quail were put into a cage with two contact quail.

  • c Four quail were put into a cage below the infected birds with the litter tray removed.

  • d Four quail were put into a cage at the same level as the infected birds but separated by 1 ft. Airflow was from the bottom and out through top filters.

  • e <, below the level of detection.

  • f NT, not tested.