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Encephalomyelitis Vaccine Eastern & Western

This page contains information on Encephalomyelitis Vaccine Eastern & Western for veterinary use.
The information provided typically includes the following:
  • Encephalomyelitis Vaccine Eastern & Western Indications
  • Warnings and cautions for Encephalomyelitis Vaccine Eastern & Western
  • Direction and dosage information for Encephalomyelitis Vaccine Eastern & Western

Encephalomyelitis Vaccine Eastern & Western

This treatment applies to the following species:
Manufacturer: Colorado Serum

Encephalomyelitis Vaccine, Eastern & Western, Killed Virus

U.S. Vet. Lic. No.: 188

Contents: ENCEPHALOMYELITIS VACCINE is prepared from formalin killed cultures of encephalomyelitis viruses propagated in a cell culture system.

Contains thimerosal, penicillin, and streptomycin as preservatives.

Encephalomyelitis Vaccine Eastern & Western Indications

The vaccine is recommended for the vaccination of equines against encephalomyelitis.

Dosage and Administration

Shake well prior to withdrawal from the bottle. Inject 1 mL deep in the muscle. Repeat in 3 to 4 weeks. A booster dose of 1 mL should be administered annually and whenever an epidemic situation develops and exposure is likely.

Precaution(s): Store in dark at 2° to 7°C.

Sterilize syringes and needles by boiling in clean water.

Use entire contents when bottle is first opened.

Caution(s): Transitory local reaction may appear at the site of injection.

Anaphylaxis (shock) may sometimes follow use of products of this nature. Adrenalin, or equivalent should be available for immediate use in these instances.

Shake the product well before withdrawing. Each dose must have proportionate share of precipitate for proper response.

Warning(s): Meat animals should not be vaccinated within 21 days before slaughter.

For veterinary use only.

Discussion: Antigenically different viruses identified as “Eastern” and “Western” types are included in the product. Infections caused by these two types of virus are clinically indistinguishable. Equines vaccinated with a vaccine containing a single virus type are not immune to the other. Similarly, an animal that has recovered from infection caused by one type of virus is not protected from disease that may be caused by the other.

At one time an immunizing program could be planned on the basis of a geographic area but in recent years the “Eastern” type virus has appeared in some of the western states and the “Western” type has been found as far east as the Appalachian mountains.

Encephalomyelitis is often referred to as horse encephalitis (inflammation of the brain), sleeping sickness, blind staggers, and brain fever. It has occurred in nearly all parts of the United States, Canada, Mexico, Central America, and South America.

The first indication of equine encephalomyelitis is fever. Temperature will vary from 102° to 107°F. Sluggishness and drowsiness are early symptoms. Lips are loose and muscles around the head, shoulder or flank may twitch spasmodically. As the disease progresses the affected animal stands dejectedly and will move with an awkward staggering gait, oftentimes stumbling blindly into obstructions. Legs are frequently crossed. Some horses may back up persistently. The sick animal, when aroused, may show interest in food or water only to lapse into a stupor with unchewed food in its mouth. Grinding of the teeth and stretching the head and neck are common.

When to Vaccinate: Encephalomyelitis is spread by mosquitos and perhaps other biting insects so animals should be vaccinated prior to the time insects become prevalent. The incidence of the disease diminishes during cold weather. Annual revaccination of all equines is recommended.

Presentation: 10 x 1 mL and 10 mL vials.

NAC No.: 11010200

4950 YORK STREET, P.O. BOX 16428, DENVER, CO, 80216-0428
Telephone:   303-295-7527
Order Desk:   800-525-2065
Fax:   303-295-1923
Every effort has been made to ensure the accuracy of the Encephalomyelitis Vaccine Eastern & Western information published above. However, it remains the responsibility of the readers to familiarize themselves with the product information contained on the US product label or package insert.

Copyright © 2016 North American Compendiums. Updated: 2016-06-30