Western Equine Encephalitis (WEE)


Vaccination Yearly Planner

January 01, 2009

Immunizations are the cornerstone of disease prevention if given appropriately and in a timely manner.... Read More


Two Texas Horses Positive for EEE

October 10, 2008

Texas has joined at least five other states this year in reporting cases of Eastern equine encephalitis infection in horses. In Houston County, in the southeast corner of the state, a horse with clinical illness has tested positive for the... Read More


Vaccination Schedule Guidelines

April 21, 2008

Developing a vaccination schedule is not as straightforward as it sounds. So much of what you should vaccinate for depends upon such factors as where you live, how often your horse travels, how old he is, his vaccination history, and what infectious ... Read More


Equine Encephalitis:The Ever-Present Threat

April 04, 2008

Eastern, Western, and Venezuelan equine encephalitis are known killers, but vaccination can help prevent them.... Read More


Texas: Water Everywhere Raises Risk of Livestock Disease

July 16, 2007

Rushing water, stagnant ponds, or even sudden dry stages after wet periods can lead to outbreaks of livestock disease. Mosquitoes and biting flies, capable of carrying and transmitting diseases, thrive in the damp weather. Prolonged... Read More


Flooded Plains States: Drying Out, Bracing for Mosquito-Borne Equine Diseases

July 12, 2007

The waters might be receding, but horse owners in Kansas, Oklahoma, Texas, and other areas affected by recent flooding shouldn't drop their guard against flood-related problems just yet. Veterinary authorities say owners in the soggy states... Read More


Scientists Test Chimera Vaccine

January 16, 2006

A new research model has been developed and successfully used to test a new type of vaccine against West Nile virus (WNV). Maureen Long, DVM, PhD, Dipl. ACVIM, assistant professor at the University of Florida, proved a chimera WNV vaccine was... Read More


The Ever-Present Threat

April 01, 2005

Editor's Note: This is the fourth in a 12-part series of articles on vaccinations for horses.

West Nile virus (WNV) might be the new kid on the block, the one gaining all the media attention, but unfortunately, it is not the only... Read More


Encephalitis: Many Causes, Deadly Outcome

July 01, 2004

Equine encephalitis has been around for a long time. Old-time horsemen simply referred to it as sleeping sickness. They knew that if a horse contracted it, the animal's prognosis was not great, and that if he did recover, his ability to perform... Read More


EEE in Venezuela

April 27, 2004

According to an April 26 ProMED report, Venezuela's Animal Health Service, Ministry of Agriculture recently reported a case of Eastern equine encephalitis (EEE) in a horse from the district Bolivar in the... Read More


New Combination Vaccines Include WNV Protection

December 05, 2003

In 2004, your veterinarian's truck might be stocked with a new combination vaccine--protection against West Nile virus (WNV) has been folded into routinely used three-way and four-way vaccines. The new combinations, manufactured by Fort Dodge... Read More


Vaccination Protocols and Internal Parasite Controls

July 29, 2003

Preventing infectious diseases and parasites from attacking our horses are primary concerns for every horse owner. James D. Smith, DVM, a practitioner at Hagyard-Davidson-McGee Associates, PLLC, in Lexington, Ky., and Craig Reinemeyer, DVM, PhD,... Read More


Eastern and Western Equine Encephalitis in 2001

April 24, 2002

Eastern equine encephalitis (EEE) and Western equine encephalitis (WEE) are mosquito-borne viral diseases that primarily affect horses east and west of the Mississippi River, as their names imply.  The Centers for Disease Control and... Read More



October 11, 2001

The initials are innocuous enough--EEE, WEE, VEE--but the diseases they stand for can be deadly to both equines and humans. They are, in order, Eastern Equine Encephalomyelitis (EEE), Western Equine Encephalomyelitis (WEE), and Venezuelan Equine... Read More


Wildlife Disease: Contagious Critters

May 01, 2001

Diseases from other animals pose a constant threat to our horses. Disease-causing agents, or pathogens, lurk in local wildlife, fly overhead in birds, and lay in the next field inside cows peacefully chewing their cuds. These disease agents--whether ... Read More


WEE Detected In Mosquitoes In Arizona

August 06, 1999

Arizona state livestock officials are warning horse owners to make sure their horses' vaccinations are up to date for a potentially fatal equine sleeping sickness—Western equine encephalitis. The Arizona Department of Health... Read More


Diagnosis Of Western Equine Encephalitis

December 01, 1997

According to the California Veterinary Diagnostic Laboratory System, Western Equine Encephalitis has been diagnosed in a 4-month-old Thoroughbred horse originating from Mercer County, Calif., with neurologic signs and nonsuppurative encephalitis. A... Read More


Common Complaints: Diseases Horses and Humans Share

October 01, 1997

The titles of numerous news stories in Florida papers during a few weeks in October shared some common words--Eastern equine encephalomyelitis. The disease has been responsible for several human deaths recently in Florida, and while in Orlando... Read More