West Nile Virus in Horses

West Nile Virus (WNV) is a mosquito-born virus that can cause encephalitis (inflammation of the brain) or meningitis (inflammation of the lining of the brain and spinal cord) in humans and horses. Mosquitoes that acquire it from infected birds transmit the virus. This virus was first discovered in the United States in New York in 1999 and has quickly spread throughout the U.S. The virus was found in dead birds as far west as Missouri and eastern Iowa in the …

Disease: Equine Influenza

Equine Influenza is a highly contagious respiratory disease, which spreads rapidly among susceptible horses. It is rarely fatal except in young horses. The incubation period of influenza is ~1-3 days. Clinical signs begin abruptly and include high fever (up to 106 degrees F [41.1 degrees C]), serous nasal discharge, and coughing that is dry, harsh, and nonproductive. Depression, anorexia, and weakness are frequently observed. Clinical signs usually last less than three days in uncomplicated cases. Cough develops early in the …

Equine Viral Rhinopneumonitis in horses

Ashley Griffin, University of Kentucky

Equine viral rhinopneumonitis (EVR) produces an acute respiratory catarrh, which is inflammation due to excessive discharge or buildup of mucus in the throat and nose. The Type I strain of EVR is the most common virus found in horses. Transmission of EVR occurs with direct or indirect contact with virus-laden nasal discharge, aborted fetus, or placenta. 

Clinical Signs

 

1. congestion and clear nasal discharge
2. mild to server ataxia or paresis (slight of incomplete paralysis) of …