Gluck Update on EEE

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Eastern equine encephalomyelitis (EEE) is only one of several important vector-borne diseases that is of significant concern to horse owners. With a mortality rate of 90%, it is a deadly disease. The U.S. Department of Agriculture Animal and Plant Health Inspection Service, Veterinary Services works with the U.S. Centers for Disease Control and Prevention and public health officials to collect data on EEE and other vector-borne diseases.

EEE Gluck Figure 1

Figure 1 shows the geographic location (shaded states) of equine EEE cases from 2003-2014, although not every state had cases each year.

EEE Gluck Figure 2

Figure 2 shows reported U.S. equine EEE cases (which include presumptive positive and confirmed positive cases) from 2003-2014.

Despite the geographic distribution of equine EEE cases, the rapid interstate and international transportation of horses for show, racing, recreation, sales, breeding, and other activities strongly supports the use of EEE vaccines. The EEE vaccine is considered by the American Association of Equine Practitioners to be a “core” vaccine.

Insect control and appropriate use of approved insecticides are critical to reducing the risks of EEE as well as West Nile virus infections, vesicular stomatitis, and other insect-borne diseases.

This article was written by Dr. Roberta Dwyer of the Gluck Equine Research Center. It was first published in the Equine Disease Quarterly, which is put out by the University of Kentucky College of Agriculture, Food and Environment Department of Veterinary Science and is sponsored by Lloyd’s of London and its Kentucky agents. You may subscribe to this publication for free.