4. Bovine viral diarrhea

Question 1

virus cause of BVD

Answer 1

flaviviridae and pestivirus

Question 2

what type of infections can bvd cause

Answer 2

transplacental

Question 3

types of bvd

Answer 3

infection of calf during gestation
cytopathic
non cytopathic

Question 4

what is the cytopathic bvd

Answer 4

virulent strain
diarrhea or resp signs in the cow
embryonic death due to developmental anomalies in bones and CNS

Question 5

what is the non cytopathic bvd

Answer 5

non virulent strain
no symptoms in the cow
embryonic death
seropositivity

Question 6

consequences of BVD infection in pregnant cows

Answer 6

Abortion
Embryonic death and re-oestrus
Immunotolerance and permanent infection
Developmental anomalies
Seropositivity

Question 7

BVD/MD clinical effects

Answer 7

sharp round ulcers
hydropic degeneration, necrosis -> erosion, ulceration
high fever, leucopenia
anorexia, diarrhoea