Menu
Forums
New posts
Search forums
What's new
New posts
New media
New media comments
New profile posts
Latest activity
Media
New media
New comments
Search media
Members
Current visitors
New profile posts
Search profile posts
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Forums
Cattle Boards
Health & Nutrition
Rotocarona-virus MLV
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Help Support CattleToday:
Message
<blockquote data-quote="milkmaid" data-source="post: 185981" data-attributes="member: 852"><p>Well, in theory, a modified live virus can mutate and really do damage - that's why a vaccine like Bovishield Gold (MLV) is only labeled for open cows OR pregnant cows <em>that have been previously vaccinated per label instructions</em>. It's because in theory that MLV could mutate and the unborn calf would then be exposed to a strain of a live BVD virus, or something along those lines - which could cause the cow to abort.</p><p></p><p>I guess you must have had some serious problems with rota-corona virus to be vaccinating all calves at birth? How are the calves doing that were NOT vaccinated while you were experimenting in an attempt to find the problem? If they're doing good I personally would be inclined to stop vaccinating calves. You've probably reached the same conclusion already though. LOL.</p><p></p><p>Off hand, I THINK you can compare boxes and see if they're from the same lot/shipment/etc. I think there should be a number on the box...perhaps by the expiration date? Using a new box of vaccines that's from the same lot as the last box that was causing trouble isn't going to do you a bit of good. I'd check numbers, and then call Pfizer on Monday and see where you can get with that. If you've used the stuff for years with no problems, perhaps there's a problem with that particular batch.</p><p></p><p>That's the only thing that comes to my mind right now. Hopefully that helps.</p></blockquote><p></p>
[QUOTE="milkmaid, post: 185981, member: 852"] Well, in theory, a modified live virus can mutate and really do damage - that's why a vaccine like Bovishield Gold (MLV) is only labeled for open cows OR pregnant cows [i]that have been previously vaccinated per label instructions[/i]. It's because in theory that MLV could mutate and the unborn calf would then be exposed to a strain of a live BVD virus, or something along those lines - which could cause the cow to abort. I guess you must have had some serious problems with rota-corona virus to be vaccinating all calves at birth? How are the calves doing that were NOT vaccinated while you were experimenting in an attempt to find the problem? If they're doing good I personally would be inclined to stop vaccinating calves. You've probably reached the same conclusion already though. LOL. Off hand, I THINK you can compare boxes and see if they're from the same lot/shipment/etc. I think there should be a number on the box...perhaps by the expiration date? Using a new box of vaccines that's from the same lot as the last box that was causing trouble isn't going to do you a bit of good. I'd check numbers, and then call Pfizer on Monday and see where you can get with that. If you've used the stuff for years with no problems, perhaps there's a problem with that particular batch. That's the only thing that comes to my mind right now. Hopefully that helps. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Cattle Boards
Health & Nutrition
Rotocarona-virus MLV
Top