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Discussion on Vaccination gone bad?
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New Member:
Poncho
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Posted on Saturday, Apr 8, 2006 - 6:32 pm:
I vaccinated my horses with 2 way sleeping sickness, Tetanus, Influenza,Rhino, and WNV. I put these vaccinations on ice and brought them to the barn. I gave them the 2 way combo, and then the WNV separate. Two the horses did just fine. But, one of the WNV immunizations ended up a little frozen since it was ice, I rubbed it in my hands and it melted within a minute. The frozen WNV was given to my 11yo QH gelding, that has had WNV injections in the past with no reactions what so ever. I went out to the barn yesterday and he had a egg size lump where the WNV was given. Today, it was not so high but the circumference is spreading as the height is decreasing. I believe it is absorbing into the body. He acts fine, just a little depressed, eats, and moves his head. It is not tender to the touch, not warm, and doesn't seem to have a temperature. I hosed him down just because it is hot out. I am wondering did this WNV go bad since it started to freeze? My second question is: Should I revaccinate if it did, and when should I wait a month or longer? We live in Tucson, Arizona where the vets reccommend us to vaccinate twice a year, spring and fall. Any help would be greatly appreciated. Thank you.
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Member:
Mrose
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Posted on Saturday, Apr 8, 2006 - 7:13 pm:
I'd be willing to bet it was the way the shot was given, not what was in it. It sounds like the way the skin looks when the fluid from a shot doesn't go deep enough. I would think freezing might alter the potency of a vaccination, but if it was thawed out, I can't see why it would cause swelling. I'm sure Dr. O. will have some comments. ( and will straighten us both out!)
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Moderator:
DrO
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Posted on Sunday, Apr 9, 2006 - 8:26 am:
Sara has it all exactly right. The important point is the freezing may have decreased the potency but if it didn't, 2 close together booster vaccines may cause more reaction ...Hmmm... since one was given 6 months ago and research does not indicate every 6 mo is better than yearly, I would just wait until the next regular 6 month vaccine.
DrO
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New Member:
Poncho
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Posted on Sunday, Apr 9, 2006 - 2:48 pm:
Ok, thank you Dr. O. But I used the same gauze on everybody, with both injections and only one reaction the WNV that was frozen perhaps it was too concentrated at the time?
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Member:
Suzeb
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Posted on Sunday, Apr 9, 2006 - 3:17 pm:
I had a similar reaction a couple of years ago. My gelding had some swelling where the shot was given. The shot was administered by my vet and I do trust her. I don't think the vaccine was frozen though.
I did tell my vet about the reaction and she reported that there were more than usual reactions of this type. They had obtained their vaccines from a different company than normal and suspected it might be the adjuvant in the vaccine that caused this.
A little bit of bute and some ice packs seemed to clear this up.
Might not help you any, but some food for thought.
Susan B.
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Moderator:
DrO
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Posted on Monday, Apr 10, 2006 - 6:46 am:
I don't see how transient freezing would make it more concentrated Karen.
DrO
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Member:
Poncho
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Posted on Monday, Apr 10, 2006 - 12:08 pm:
Thank you Dr. O and everybody else for your input. I went out to the barn yesterday and his lump was down considerably almost gone. So I guess I won't find out until the fall now if it is the WNV or the freezing or they way it was administered. Thanks again!
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