IB nephritis broiler chicken (4 weeks old)
Trachea of 4 weeks old broiler: Caseous cast. Tracheitis.
Infectious bronchitis in 4 weeks old broiler
Inoculation at 9-11 days old of chicken embryos via allantoic sac.
"Curling" of embryos with a wry neck and feet deformed and compressed over the head.
Retardation of growth.
Cystic oviduct in commercial layer
Cystic oviduct with water-like fluid accumulation in commercial layer
Cystic dilatations with a watery content