Lesions of Infectious Bronchitis Virus (IBV) infection

Post mortally, lesions are found in the respiratory tract and urogenital tract. Renal damage associated with different IB strains is an increasingly important feature of IB infections, especially in broilers.

Post mortem lesions

  • Serous, catarrhal, or caseous exudates in the trachea, nasal passages and sinuses.
  • Cloudy air sacs, may contain yellow caseous exudates.
  • Caseous plug may be found in the trachea.
  • Pneumonia.
  • Swollen, pale kidneys, with distended tubules and ureters containing urate crystals in nephropathogenic cases.
  • Fluid yolk material may be found in the abdomen of birds in production (egg peritonitis).
  • Degeneration of the ovary and swollen oviducts. Read more about¬†variant D388 (QX).
swollen kidneys
Swollen, pale kidneys.
degenerated ovary
Degenerated ovary showing atrophic and haemorrhagic follicules from a hen in lay.