Non-Compliance Of Flu Vaccine Administration Leaves Horses Vulnerable

Horses in the United Kingdom may be at risk of the flu even if they are vaccinated because of non-compliance with manufacturing guidelines, research shows. Drs. Amie Wilson, Gina Pinchbeck, Rachel Dean and Catherine McGowan created a survey that asked equine vets in the UK to describe their vaccination practices. The study team then compared these protocols with manufacturer guidelines and datasheets.

Of the 304 responses, 92 percent indicated that the recommendations they give owners are not consistent with manufacturer guidelines for administering the vaccine. Vets most often used vaccination guidelines from the British Horseracing Authority and the Fédération Equestre Internationale.

Additionally, there was variation in vaccine booster protocol for competition and noncompetition horses. The most recommended strategy, given by 57 percent of survey respondents, was a 6-month flu vaccine shot for competition horses and annual flu vaccine administration for non-competition horses.

Nearly 86 percent of vets reported that their clients were reluctant to administer vaccines because of fear of over vaccination, cost and the potential for adverse reactions. Of the vets who responded, 66 percent had horses that experienced an adverse reaction to vaccination, but only 19 percent of these vaccination reactions were reported to the Veterinary Medicines Directorate. Most reactions included stiffness, swelling, lethargy and fever.

The study team noted that there is a discrepancy between manufacturer guidelines for flu vaccinations and those issued by governing bodies for equestrian sport and racing. Non-compliance is common, leaving horses at risk for getting the flu.

Read the study here.

Read more at EquiManagement.

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Should A Horse With An Unknown History Be Vaccinated?

If a horse is bought at a sale or an auction and his vaccination history is unknown, what is the best approach for administering routine shots? Should he be given boosters, assuming he has been vaccinated previously? Or should he be given shots as if he has no vaccination history at all? Do titers need to be pulled to see what, if any, diseases he is immune to? These are all important questions that can greatly affect a horse's health and safety.

It's best to treat a horse with no vaccination history as if he has never received any vaccines, administering both shots and their routine boosters, reports EQUUS magazine. Administering additional doses of most vaccines is not harmful, with one exception: The strangles vaccine.

In rare instances, horses that have had strangles before, or those that have been repeatedly vaccinated for strangles, may develop a potentially serious complication if administered the vaccine again: purpura hemorrhagica. This abnormal reaction is when the blood vessels of the head, legs and abdomen swell.

Owners of horses with unknown vaccination history would be wise to draw a titer to see if the horse has antibodies to the organism that causes strangles before administering the vaccine.

Read more at EQUUS magazine.

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