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Equine Potomavac 1 ds (1 ml )

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Product Overview

How To Use

What’s in it?



Questions & Answers

Product Description

Equine Potomavac® is inactivated Ehrlichia risticii in a liquid suspension. Ehrlichia risticii is the cause of equine monocytic ehrlichiosis (Potomac horse fever). Controlled testing and field evaluation has demonstrated efficacy and safety of this vaccination.
*This is a cold ship item. *This item can't be shipped to MN. 

Who is Equine Potomavac 1 ds (1 ml ) for?

For use in horses (ages 3 months and up).

Why use Equine Potomavac 1 ds (1 ml )?

Features of Equine Potomavac®:
  • 86% effective in protecting your horse from Potomac Horse Fever (equine monocytic ehrlichiosis)
  • 100% effective in protecting your horse against mortality
  • Protects healthy horses from Ehrlichia risticii, which causes PHF

How does Equine Potomavac 1 ds (1 ml ) work?

Equine Potomavac® is a vaccine consisting of inactivated Ehrlichia risticii in the form of a liquid suspension. When a healthy horse is vaccinated with Equine Potomavac®, an immune response is triggered. This response protects the horse against equine monocytic ehrlichiosis (Potomac Horse Fever) resulting from Ehrlichia risticii infection.


Boehringer Ingelheim

Active ingredient(s):

EQUINE POTOMAVAC® is a liquid suspension of inactivated Ehrlichia risticii.

How is Equine Potomavac 1 ds (1 ml ) sold?

Equine Potomavac 1 ds (1 ml )

What are the side effects of Equine Potomavac 1 ds (1 ml )?

Rarely, vaccines can have the following adverse reactions:
  • Hypersensitivity reactions
  • Inflammatory reactions
  • Fever
  • Lethargy
These reactions can typically be treated using epinephrine, anti-inflammatory medications, and/or antihistamines.

What special precautions are there?

  • Field evaluations and controlled challenge testing have shown efficacy and safety for this vaccine.
  • Wanted results may not be obtained in animals with compromised immune response caused by disease, stress, or other conditions.
  • Following initial and booster vaccine, revaccination should take place annually.
  • Discuss your horse's vaccination routine with your veterinarian.

What to do if overdose?

Contact your closest emergency pet hospital.

How can I store Equine Potomavac 1 ds (1 ml )?

Shake well before opening. Once opened, use entire contents. Don't freeze. Store at 35-45°F (2-7°C).

Helpful Tips:

Potomac Horse Fever is a common disease in horses. The gastrointestinal effects of PHF are the most notable, including diarrhea or enteritis. Neorickettsia risticii and Ehrlichia risticii cause PHF. These are organisms that take residence in many of the cells in a horse's body. Potomac Horse Fever is also known as equine ehrlichial colitis or equine monocytic ehrlichiosis.


DOSAGE: For primary vaccination, aseptically inject 1 mL (1 dose) intramuscularly into healthy horses 3 months of age or older. Revaccinate with a second 1 mL dose 3 to 4 weeks later. Revaccinate annually with a single 1 mL dose.

Main Ingredients

EQUINE POTOMAVAC® is a liquid suspension of inactivated Ehrlichia risticii


Potomac horse fever (PHF) is a disease of equids best known for its gastrointestinal signs such as enteritis and diarrhea. This disease is caused by Neorickettsia risticii, an organism that lives inside several different cells of the equine body. This disease has been referred to in the past as equine monocytic ehrlichiosis, or equine ehrlichial colitis. The first prominent sign of PHF often observed by owners is a decrease in feed intake. In fact, some horses may not initially show any other clinical signs except not eating.

Potomac horse fever is caused by Neorickettsia risticii, an organism member of the Erlichiaea family. According to the isolates obtained from clinical cases, there is diversity in the organism and each isolate has a different pattern of antigenic proteins. Therefore, Potomac horse fever is caused by more than one strain ofNeorickettsia risticci. Cases of Potomac horse fever have a seasonal presentation with the highest number of cases with clinical signs in July, August, and September.


Potomac horse fever is found throughout in North America and has been reported in most regions of the United States and Canada. Studies have shown that 16 - 33 percent of horses with no history of having had the disease have evidence of having been exposed to N. risticii.  N. risticii can cause abortions, and it is related to placentitis and retained placenta in most cases. The aborted fetus will show signs of the infection as well. Direct transmission from horse to horse does not occur.


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Equine Potomavac 1 ds (1 ml )

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is it ok to vaccinate a horse while in recovery of potomac fever?

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