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  1. #1
    Join Date
    Feb. 23, 2009
    Location
    Knoxville, TN
    Posts
    82

    Default IM strangles vaccine reaction

    My horses were vaccinated on Friday for Strangles with an IM vaccine in the chest. This morning all of the horses that received the vaccine had hard swelling in the pectoral muscle where the vaccine was given. One had difficulty walking out to the pasture.

    I called the vet who told me reactions were common, to give them bute and a hot compress on the site, and so on. My concern, that I relayed to her, was that they had received a bad batch of vaccine since every horse had a reaction. I have never had any horse have a reaction before. Have any of you had a similar experience? Any ideas about how long the recovery should take?



  2. #2
    Join Date
    Jul. 11, 2009
    Location
    New England
    Posts
    944

    Default

    I switched to the NASAL strangles vaccine years ago. I am kind of amazed that there are vets that still use the IM as their is a risk of Purpura with it. Yes the swelling is normal, a little bute and hot compress will do the trick. No its not likely a 'bad batch', this kind of reaction is perfectly normal even for large numbers of horses.



  3. #3
    Join Date
    Jun. 12, 2007
    Location
    CT
    Posts
    6,156

    Default

    Yes, we only use intranasal as well. It's a trade-off- sore necks with the IM or the snots with the intranasal.



  4. #4
    Join Date
    Jan. 28, 2003
    Location
    Hollywood, but not the one where they have the Oscars!
    Posts
    7,773

    Default

    I will NOT use strangles vaccine. My best friend's horse died after struggling with Purpura after the IN vx....not worth the risk for either in my opinion
    "You can't really debate with someone who has a prescient invisible friend"
    carolprudm



  5. #5
    Join Date
    Feb. 23, 2009
    Location
    Knoxville, TN
    Posts
    82

    Default

    What is purpura?



  6. #6
    Join Date
    Apr. 21, 2000
    Location
    Upperco, MD
    Posts
    479

    Default

    Wow, the IM vaccine hasn't been used in my area in years--since the IN vaccine was developed--because it often caused a worse reaction than strangles itself. Why did your vet use the IM instead of the IN? Has he always done so?



  7. #7
    Join Date
    Aug. 8, 2004
    Location
    Back in the 'nati
    Posts
    3,310

    Default

    As far as I know, there is a risk of developing purpura hemorrhagica with both the IN and IM vaccines. It's an immune complex reaction that causes severe vasculitis and can lead to death. It happens in horses that have a high titer already when they are vaccinated (either from previous vaccination or active infection).

    The IM vaccine does tend to cause reactions like abscesses and swellings. The IN vaccine is a modified live vaccine and reversion to virulence has been reported, which basically means it "reactivates" to active, infective bacteria. So both carry some risk.



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