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infectious laryngotracheitis(1) Laryngotracheobronchitis, see there.
(2) A viral infection that affects the respiratory tract of chickens, pheasants and peafowl, which can spread rapidly and cause high mortality in susceptible poultry.
The birds have difficulty breathing, cough and gasp; they may stand with their wings spread, their head and neck extended, struggling for air. Milder signs include discharges from the birds’ eyes and nostrils. Up to 100% of a flock can be affected; up to 70% die.