title: [Respiratory diseases of the fowl:principles of histopathological diagnosis].
abstract: Groups of specific pathogen free chickens were inoculated with five strains of Newcastle disease virus, one strain of adenovirus, four strains of infectious bronchitis virus, one strain of Mycoplasma gallisepticum and with infectious bronchitis virus together with Mycoplasma gallisepticum. Lungs and tracheas were taken at regular intervals for histopathological examination. A diagnosis could be based on tracheal lesions at different periods of their development. Newcastle disease was distinguished by a necrotic and haemorrhagic tracheitis. Adenovirus infection caused epithelial degeneration with basophil intranuclear inclusion bodies and discrete infiltration of the lamina propria by lymphocytes and histiocytes. Infectious bronchitis was characterised by a strong hyperplasia of epithelial cells and Mycoplasmosis by a massive infiltration of the lamina propria by lymphocytes and histiocytes. Epithelial hyperplasia and cellular infiltration of tracheal mucosa were typical of mixed infection with infectious bronchitis virus and mycoplasma.
authors.affiliation: Faculte de Medecine Veterinaire de l'Universite de Liege, 45, rue des Vétérinaires, B-1070, Bruxelles, Belgique.
authors.forename: M
authors.initials: M
authors.lastname: Gouffaux
authors.forename: H
authors.initials: H
authors.lastname: Vindevogel
authors.forename: G
authors.initials: G
authors.lastname: Meulemans
authors.forename: A
authors.initials: A
authors.lastname: Dewaele
authors.forename: P
authors.initials: P
authors.lastname: Halen