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Table 1 Number of infected and contact birds showing clinical disease signs

From: Infectivity and transmissibility of H9N2 avian influenza virus in chickens and wild terrestrial birds

Species Broiler chickens Layers Jungle fowl Quail Sparrows Crows
Clinical signs Infected (10) Contact (5) Infected (10) Contact (5) Infected (10) Contact (5) Infected (10) Contact (5) Infected (10) Contact (5) Infected (10) Contact (5)
General sickness/ 8 5 10 5 8 5 10 5 9 5 - -
Sneezing 8 1 8 4 8 2 7 4 10 - - -
Respiratory sound (rales) 6 1 8 4 - -x 7 2 10 2 - -
Occular/nasal discharge 8 1 6 4 - - - - 10 2 - -
Eye redness 8 2 8 3 - - - - 10 2 - -
Head Swollen 6 2 7 4 - - 6 2 6 3 - -
Ruffled Feathers 6 2 10 5 8 2 10 2 10 - 2 -
Reluctant to move 6 2 4 4 - - - - 6 2 - -
  1. Infected birds were inoculated with 106.6 EID50 UDL-01/08 virus. Clinical signs were observed between 2–5 dpi. The number in parentheses is the total number of birds in a group. (-), indicates no apparent clinical disease signs.