Sunday, February 25, 2007


Horse Diseases

* Eastern Equine Encephalitis
* La Enfermedad de Lyme en Caballos de Florida
* Equine Infectious Anemia
* Lyme Disease in Florida Horses
* West Nile Virus

What is Eastern Equine Encephalitis?

Eastern equine encephalitis (EEE) is a virus disease transmitted to horses and humans by mosquitoes. Birds are the source of infection for mosquitoes. The virus is found along the east coast from New England to Florida, the Gulf Coast, and some midwestern areas. The principal vector in avian populations is the mosquito Culiseta melanura. This mosquito does not feed on humans or horses, but in rare cases the virus can escape from its marsh habitat in other mosquitoes that feed on both birds and mammals (including horses and humans) and then transmit the virus to mammals, including people. Horses and humans are "dead end" hosts, meaning that they do not develop enough virus in their blood to transmit the virus (therefore sick horses or humans can't transmit the disease to mosquitoes, only birds can).

Equine Infectious Anemia

Equine infectious anemia (EIA) or swamp fever is a viral disease of horses that has been known to exist for more than 70 years. It is characterized by anemia, intermittent fever, depression, progressive weakness, loss of weight, and swelling of the legs, brisket, and lower abdomen. In the acute form, animals are extremely sick and may die. Horses that have the chronic form, or recover from the acute or subacute form to become chronic, usually have intermittent attacks ranging from one week to a month or more between attacks. Some horses die during these recurrent episodes. A latent or subclinical form of EIA may also develop in equines. These animals appear normal but are carriers of the virus in their blood. Carrier animals are potential sources of infection for susceptible healthy horses. Horses have been known to harbor the virus for more than 18 years.

http://edis.ifas.ufl.edu/TOPIC_Horse_Diseases

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