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Respiratory Viral Infections (view source)

Revision as of 12:06, 30 June 2010

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===[[Bovine adenovirus]]===

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===Respiratory ~~syncytial virus~~===

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===[[Bovine Respiratory Syncytial Virus]]===

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*Causative agent [[Paramyxoviridae|Respiratory syncytial virus (RSV)]], synonym: bovine RSV (BRSV)

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*Outbreaks of RSV associated disease usually occur associated with winter housing

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*Gross pathology in severe cases

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**Cranioventral [[Lungs Ventilation - Pathology#Atelectasis (Collapse)|atelectasis]] and consolidation

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**[[Lungs Ventilation - Pathology#Emphysema|Interstitial emphysema]]

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***More prominent in the caudal lung lobes

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***Results from bronchoconstriction which results in airway obstruction - this constriction is thought to arise from [[Mast Cells|mast cell]] degranulation and histamine release

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*Histologically

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**[[Bronchi and Bronchioles Inflammatory - Pathology#Acute bronchitis/bronchiolitis|Acute bronchiolitis]], characteristic of the bronchiolar response is the formation of syncytial giant cells (formed by proliferating bronchiolar epithelial cells which may contain [[Degenerations and Infiltrations - Pathology#Cellular Inclusions|intracytoplasmic inclusion bodies]]), alveolar epithelium sometimes affected

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**Obstruction of bronchioles by exudate - these may later become obliterated by the fibrous tissue of organisation

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*May contribute to [[Respiratory Bacterial Infections - Pathology#Enzootic pneumonia of calves|Enzootic pneumonia of calves]]

===[[Bovine rhinovirus]]===

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