IBR

[braebank1]

Is there any method of maintaing an IBR negative status on bull calves with out vaccinating?
These calves are to be collected for the EU, ( IBR negative status required), at the same time shown here in North America?

 

[redcowsrule33]

Only 100% way is strict isolation/quarantine, which will be impossible on the show circuit. If you vaccinate, use a vaccine (if you can find it) that prevents infection, not just symptoms. If you can't vaccinate and must show, share nothing. Demand to have stalls that do not have cattle head to head. And accept that you are at high risk of getting it anyway.

 

[bigag03]

Vaccinate calves as usual. By the time you get ready to collect the bulls, the titer will not be high enough to matter. The titer usually drops to acceptable levels within 60 to 90 days after vaccination.

 

[Lucky_P]

Use one of the MLV intranasals - they do a better job of preventing respiratory disease than the injectibles, anyway . Fewer adverse reactions with TSV-2 than Nasalgen, and the new Inforce 3 from Pfizer also contains BRSV; we're using it this fall. You'll probably get minimal to no detectable IBR serum titer with the intranasals (titers don't really give any reliable measurement of 'protection', anyway) - but you should get good protection against respiratory infection.

Straying a bit from the original question, as I can't really comment on how quickly IBR titers will drop...
Injectible MLV vaccines 'block' effective immune response to bacterins(clostridials, Pasteurella/Mannheimia, etc.) given at the same time, but the intranasals don't. So... if you're giving bacterins at the same time you're using a MLV, it's better to give the bacterin with an intranasal, and then, if you need to booster with a MLV IBR/BVD - for reproductive protection - use one of the injectible MLV vaccines as a booster 10-14 days later.