Pathobiology of Naturally Occurring Uncomplicated Ornithobacterium Rhinotracheale Infection in Layer Chicken
Loading...
Date
2014-01
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Pathobiology of uncomplicated
Ornithobacterium rhinotracheale (ORT)
infection in layer chicken was evaluated in 30
commercial layer chicken farms.
Ornithobacterium rhinotracheale organism
was confirmed by its growth characteristics
on agar media and typical morphology on
Gram’s staining. Commonly encountered
concurrent respiratory virus and bacteria
were ruled out. Polymerase chain reaction
technique was used to rule out Mycoplasma
gallisepticum. Newcastle disease and
Infectious bronchitis were screened by
haemaggutination and inhibition tests and
bacterial diseases like Colibacillosis,
Pasteurellosis and Infectious coryza were
ruled out by culture and staining techniques.
Uncomplicated cases of ORT revealed mild
sinusitis with crusts in the external nares,
mild subcutaneous swelling of face, catarrhal
rhinitis and tracheitis, airsacculitis and
unilateral or bilateral pneumonic changes of
the lungs. Foamy, whitish, yogurt like
exudates with strands of fibrin was observed
in the abdominal airsacs. Gross and
histopathological changes were observed
throughout the respiratory tract and seven
per cent mortality was recorded in the
uncomplicated cases.
Description
TNV_SIJVS_2014_1(3)27-32
Keywords
Veterinary Science