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Bovine Respiratory Syncytial Virus (view source)
Revision as of 18:55, 13 October 2008
, 18:55, 13 October 2008→Pathogenesis
====Pathogenesis====
====Pathogenesis====
*More serious than [[Paramyxoviridae#Parainfluenza -3 (PI-3)|PI-3]]
*More serious than [[Bovine Parainfluenza - 3 (PI-3)|PI-3]]
*Causes [Respiratory Viral Infections - Pathology#Respiratory syncytial virus|respiratory infection]]
*Causes [Respiratory Viral Infections - Pathology#Respiratory syncytial virus|respiratory infection]]
*Replicates in nasal epithelium -> throughout upper respiratory tract -> bronchial tree
*Replicates in nasal epithelium -> throughout upper respiratory tract -> bronchial tree
*Syncytia form -> shed into bronchioles
*Syncytia form -> shed into bronchioles
*Complications include [[Lungs Ventilation - Pathology#Emphysema|emphysema]] and [[Lungs Circulatory - Pathology#Pulmonary oedema|oedema]], drop in milk yield in adult cattle
*Complications include [[Lungs Ventilation - Pathology#Emphysema|emphysema]] and [[Lungs Circulatory - Pathology#Pulmonary oedema|oedema]], drop in milk yield in adult cattle
====Epidemiology====
====Epidemiology====
**Subclinical reinfections are important in spreading disease
**Subclinical reinfections are important in spreading disease