Author, Donkey, Bureaucrats, Administrators
53,803
edits
Changes
Jump to navigation
Jump to search
Infectious Bovine Rhinotracheitis (view source)
Revision as of 10:22, 22 May 2010
, 10:22, 22 May 2010no edit summary
Also known as IBR
Also known as IBR
Caused by:[[Bovine Herpesvirus 1]]
Caused by:[[Bovine Herpesvirus 1]]
*IPV has mostly been made obsolete by AI
*IPV has mostly been made obsolete by AI
[[Image:IBR nasal cavity.jpg|right|thumb|100px|<small><center>IBR in nasal cavity (Image sourced from Bristol Biomed Image Archive with permission)</center></small>]]
[[Image:IBR trachea.jpg|right|thumb|100px|<small><center>IBR in trachea (Image sourced from Bristol Biomed Image Archive with permission)</center></small>]]
*URT infection with serous nasal discharge, increases respiratory rate, coughing and moderate fever,from nasal mucosa down to bronchioles
*[[Nasal Cavity Inflammatory - Pathology|Rhinitis]], [[Nasopharynx Inflammatory - Pathology#Infectious causes of pharyngitis|pharyngitis]], [[Larynx Inflammatory - Pathology|laryngitis]], [[Trachea Inflammatory - Pathology|tracheitis]], [[Bronchi and Bronchioles Inflammatory - Pathology|bronchiolitis]]
*Morbidity is high, mortality is low
*Highly infectious URT disease of cattle
*Spread by movement of animals, aerosol transmission - requires close contact between animals
*Early stages (only first few days) may show [[Degenerations and Infiltrations - Pathology#Cellular Inclusions|intracellular inclusions]] in the respiratory mucosal epithelial cells
*Leading to neutrophilic inflammation of varying severity.... serous -> catarrhal -> purulent
*With secondary bacterial infection (eg: [[:Category:Pasteurella and Mannheimia species|Pasturella spp.]], [[:Category:Mycoplasmas|Mycoplasma spp.]], [[Fusobacterium|Fusobacterium necrophorum]]) can lead to fibrinous to necrotizing inflammation; mucosal sloughing, ulceration... pyrexia, dyspnoea ... [[Lungs Inflammatory - Pathology#Aspiration pneumonia|inhalation pneumonia]]... death
*Underlying hyperaemic inflammatory response
*Can become latent following primary infection
*Clinical signs:nasal discharge, sneezing, coughing, lacrimation, and increased respiratory rate
*Clinical disease most severe in young calves - can develop mucosal ulcerative lesions in the [[Oesophagus - Pathology#Erosive & Ulcerative Pathology|oesophagus]] and forestomachs and viraemia with multiorgan infection
*Cause of abortion >5 months of gestation
*May contribute to [[Respiratory Bacterial Infections - Pathology#Enzootic pneumonia of calves|Enzootic pneumonia of calves]]
[[Category:Cattle]]
[[Category:Cattle]]