IBR

Question 1

15. Definition of IBR-virus free bovine herd

Answer 1

No confirmed case during last 1 year
No vaccination for the last 2 years
Serological testing (gE if DIVA vaccinated before)
- From blood, milk, meat juice (bulk milk: x3 samples at min 3 m interval) Over a period of maximum 12 months, of:
▪ All bovine
Or At least x2 at a 2-12 months interval, of:
▪ All females > 12mo
▪ All breeding males > 12mo
▪ Random sample of non-breeding animals > 12mo
- All animals introduced
From IBR-free herd and seronegative
Or quarantined until seronegative
- All germinal products from IBR-free animals
- General measures

Question 2

16. Maintenance of IBR-virus free status in bovine herd

Answer 2

Requirements fulfilled
- Negative serology
From blood, milk, meat juice (bulk milk: x3 samples at min 3 m interval)
Of all animals > 24 mo
Yearly

Question 3

DIVA vaccination in case of IBR - likely additional question

Answer 3

Vaccine strategy, controlled with ELISA or special PCR
- Must be authorized, in case of outbreak, under supervision of competent authority
- Vaccinated only moved to slaughterhouse or to zone where there is no vaccine ban