Cattle Abortion: Virus Flashcards
(23 cards)
BVD: transmission
Depends on stage of pregnancy to severity
Nose to mouth contact
Other infected cattle or PI calves
BVD: diagnosis
Detection of antibodies in bulk milk, detection of antigen or virus in tissue
BVD: abortion rate
Usually low
BVD: time of abortion
From 2 months
BVD: placental findings
No specific gross lesions
BVD: fetal findings
Embryonic/ fetal death
Mummification
Congenital abnormalities of the CNS or eyes (cerebellar hypoplasia, mucosal disease in PI)?
BHV-1: transmission
Associated with previous or intercurrent respiratory disease in the herd
BHV-1: abortion rate
Sporadic
Up to 60%
BHV-1: time of abortion
4 months to term
BHV-1: placental findings
No specific gross lesions
BHV-1: fetal findings
May be hepatic necrosis
Schmallenberg: transmission
Culicoides
Schmallenberg: clinical signs
Mild disease
Milk drip
Pyrexia
Diarrhoea
Abortion or birth defects
Schmallenberg: diagnosis
Tissues sample from fetus or placenta
Schmallenberg: prevention
Vaccination of calves
Schmallenberg: placental findings
No lesions
Schmallenberg: fetal findings
Birth defects
Stiff limbs
Fused/twisted joints
Hydrocephaly - brain damaged, undershot jaw
Blue tongue: transmission
Insect borne
Blue tongue: clinical signs
Reduced reproductive performance
Milk drop
Fever
Nasal discharge
Swelling of head and neck
Conjunctivitis
Ulceration of mouth
Swelling of teats
Abortion
Blue tongue: diagnosis
Virus detection PCR
Blue tongue: prevention
Vaccination
Blue tongue: placenta findings
No lesions
Blue tongue: fetal findings
Hydrocephaly or malformed
