| Description:
|
Parainfluenza-3 virus
(PI-3) is an RNA virus classified in the paramyxovirus
family. Infections caused by PI-3 are common in cattle.
Although Parainfluenza-3 is capable of causing disease, it is usually
associated with mild to subclinical infections. The
most important role of PI-3 is to serve as an initiator
that can lead to the development of secondary bacterial
pneumonia. Clinical signs include pyrexia, cough, serous
nasal and lacrimal discharge, increased respiratory
rate, and increased breath sounds. The severity of signs
worsen with the onset of bacterial pneumonia. |
