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→Bovine Parainfluenza - 3 (PI-3)
*Virulence varies with isolates
*Virulence varies with isolates
*Cessation of ciliary clearance and epithelial necrosis predisposes to secondary bacterial infections -> cough
*Cessation of ciliary clearance and epithelial necrosis predisposes to secondary bacterial infections -> cough
*Part of calf pneumonia
*With other agents causes [[Viral infections#Enzootic pneumonia of calves|calf pneumonia ]]
**Together with managemental factors (overcrowding, poor ventilation, high humidity, deprivation of colostrum and stress caused by transport or mixing of stock)
**Together with managemental factors (overcrowding, poor ventilation, high humidity, deprivation of colostrum and stress caused by transport or mixing of stock)
*Parainfluenza - 3 in [[Viral infections#Parainfluenza- 3|rhinitis]] of cattle
*Parainfluenza - 3 in [[Viral infections#Parainfluenza- 3|rhinitis]] of cattle