International Equine Disease Report, Fourth Quarter 2009

The International Collating Center, Newmarket, England, and other sources reported the following disease outbreaks.

Contagious equine metritis (CEM) was reported in France (one case), Germany (two cases) and the United Arab Emirates that involved a non-breeding Thoroughbred stallion detected on pre-export testing.

Outbreaks of equine herpesvirus-1 (EHV-1) related diseases were reported from Argentina, Australia, Germany, Japan, S. Africa, the UK and the US. Cases of herpesvirus abortion were diagnosed on three premises in Argentina; on two premises the mares were unvaccinated. Australia reported eight abortions in mares on three farms in Victoria. Isolated cases were reported from Japan and the UK. An outbreak of EHV-1 abortions occurred on four premises in S. Africa. The US confirmed five EH V-1 cases of abortion in Kentucky. Sporadic cases of EHV-1 myeloencephalopathy were diagnosed in Japan, Germany and the US. Equine herpesvirus 4 related respiratory disease was reported from Australia, Germany, Korea, Turkey, the UK, and the US.

Equine influenza was reported from France, Germany, Sweden, the UK and the US. The disease was diagnosed on five premises in France; the majority were unvaccinated horses. Limited evidence of infection was reported from Germany, Sweden and the US. Seven outbreaks of influenza were confirmed in England, Scotland and Wales.

Strangles was reported from Australia, France, Germany, Korea, Sweden, the UAE and the US. Some 31 cases on nine premises were confirmed in France; Sweden reported 20 affected premises. The UAE confirmed strangles in 14 Arabians imported from Europe.

France, Germany, Ireland, S. Africa, Spain, Switzerland, the UAE, and US recorded outbreaks of piroplasmosis. With the exception of Ireland, Germany and the US, the remaining countries considered piroplasmosis endemic. Ireland confirmed Theileria equi infection in 50 horses on 6 premises. The majority of 48 positive horses in Germany were infected with T. equi; many were imported animals. The overall seroprevalence of infection in Switzerland was 7.7 percent. The US reported 357 horses seropositive for T. equi in 12 states; 289 on the index premises in Texas. An additional 13 horses were confirmed positive for T. equi in New Mexico, epidemiologically unrelated to Texas premises.

Belgium, Germany, the UK and the US confirmed cases of equine infectious anemia. The disease occurred on several premises in Germany where the source of infection was not determined. Isolated cases of the disease were reported from Belgium and the UK in horses imported from Romania.

Eastern equine encephalomyelitis was confirmed in the US with 47 cases, primarily in southern states. Outbreaks of West Nile Virus infection were reported from Italy (38 cases) and the US (77).

Cases of leptospirosis were reported from Germany, Turkey and the US. A total of 18 sporadic cases of abortion were confirmed in Kentucky. The US confirmed 23 cases of Lawsonia intracellularis infection in foals, the vast majority in Kentucky. Several cases of Hendra virus infection were reported in Queensland, Australia; all but one were fatal. Sadly, one attending veterinarian also succumbed to Hendra virus infection.

This is an excerpt from Equine Disease Quarterly, funded by underwriters at Lloyd's, London, brokers, and their Kentucky agents.

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Equine Disease Quarterly

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