International Equine Disease Report, Fourth Quarter 2008

The International Collating Centre, Newmarket, England, and other sources reported the following disease outbreaks:

Two cases of contagious equine metritis (CEM) were confirmed in non-Thoroughbred horses in France. As of Feb. 23 the USDA reported 11 non-Thoroughbred stallions positive for (CEM) during the recent outbreak–four in Kentucky, three in Indiana, three in Wisconsin, and one in

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The International Collating Centre, Newmarket, England, and other sources reported the following disease outbreaks:

Two cases of contagious equine metritis (CEM) were confirmed in non-Thoroughbred horses in France. As of Feb. 23 the USDA reported 11 non-Thoroughbred stallions positive for (CEM) during the recent outbreak–four in Kentucky, three in Indiana, three in Wisconsin, and one in Texas. Three non-Thoroughbred mares have been identified as CEM positive in Wisconsin, Illinois, and California following natural breeding or via semen from stallions recently identified as CEM positive.

During 2008 the USDA reported 168 cases of Eastern equine encephalitis throughout the United States, with 86 cases in Florida, 22 in Georgia, and 21 in Alabama.

Respiratory disease attributable to equine herpesvirus (EHV) was diagnosed in a horse in France. Neurological disease attributable to EHV-1 was diagnosed in a horse in France and three polo ponies in the United Kingdom. Clinical signs exhibited by the polo ponies were not typical of EHV despite evidence of seroconversion and isolation of EHV-1 from the nasopharynx of one animal. Sporadic cases of EHV-associated neurological disease were reported from several parts of the United States. A case in a 7-year-old pony in Kentucky during November was caused by the non-neuropathogenic strain. During December two horses were euthanized on separate farms in Delaware resulting from the non-neuropathogenic strain, and a 2-year-old Thoroughbred filly at Laurel Park racetrack, Maryland, was euthanized following EHV-1 infection. At the end of December a Thoroughbred horse at Fair Grounds racetrack, Louisiana, developed signs of paralysis caused by EHV-1. Japan and the United Kingdom each reported a single case of EHV-1 abortion, and three cases were reported in central Kentucky

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