Bovine resp Flashcards
name the 4 viruses which contribute to bovine resp infections?
- RSV - syncitial
- PIV3 - influenza
- BHV1 - herpes, IBR
- BVD - d+
which 2 viruses belong to the family paramyxoviridae?
RSV and PIV3
what is the pathogenesis of both RSV and PIV3?
attach to cells, nucleocaspids are released to target cells
what disease does RSV cause?
interstitial pneum + emphysesm syncitial cells (m-nuc giant) with eosinphilic inclusion bodies
what disease does PIV3 cause?
bronchitis and bronchiolitis
alv cell hyperplasia
giant cells
inclusion bodies @ d5-7
what disease does BHV-1 cause?
inf bovine rhinotracheitis @6-18mo
slough cell in URT –> 2ry infection (shipping fever commonly)
what causes shipping fever?
mannheimia haemolyticia
how many types of BVD are there?
2
what is the prevalence on farm of BVD?
60-80%
what is the pathogenesis of BVD
destroys alv mphages
depletes lymphoid tissue
other than d+ what other signs are their for BVD
repro losses @ 1st trimester
PI/teratogenic effected calf (2nd tri)
NON infected calf (3rd tri)
or mucosal disease = develop the cytopathic biotype! -> mortality ++
name the 4 bacteria which contribute towards the BRDC
- mycobacteria (bovis0
- pastuerella multocida
- mannheimia haemolytica
- histophilus somni
what is significant about mycobacteria which effects treatment
no cell wall
gram +
commensals of both URT and LRT
survives in the mphages
what disease (other than TB and tubercles) does M bovis cause>
cuffing pneumonia
septic arthritis
otitis media
mastitis
what are the family pastuerellaceae?
gram - facult anaerobes bacilli/cocci RTX toxins fibrinous pleurisy
