The International Collating Center, Newmarket, England, and other sources reported the following equine disease outbreaks for the first quarter of 2015:

The final cases in the 2014-15 vesicular stomatitis outbreak in the United States were reported early in the first quarter of 2015. Two horses on a premises in southern Arizona were both infected with the New Jersey serotype of the virus.

One case of glanders was confirmed in Germany. There was no evidence of spread of infection to other horses on the index premises. The source of infection remains undetermined.

Outbreaks of strangles were reported by Denmark, France, Germany, Ireland, and the United States. Denmark confirmed an isolated case of the disease. Fourteen outbreaks were diagnosed in France, involving primarily Thoroughbreds and Warmbloods. Germany and the United States reported that strangles was endemic. The disease was considered widespread in Germany, and at least 16 states in the United States recorded outbreaks, with multiple cases confirmed on premises in Kentucky, Maryland, and South Carolina.

Equine influenza was reported by France, the United Kingdom (UK), and the United States. Three outbreaks were confirmed in France and five in the UK. The United States reported influenza as endemic, with outbreaks diagnosed in Kentucky (two), Michigan (one), and South Dakota (one).

Equine herpesvirus-1 and -4 (EHV-1 and EHV-4) related diseases were recorded in France, Germany, Ireland, Japan, Switzerland, the UK, and the United States. Respiratory disease was confirmed in France (five outbreaks), Ireland (12 cases), Switzerland (undefined number on several premises), the UK (three cases, separate premises), and the United States (disease endemic, indeterminate number of cases). Abortion due to EHV-1 was diagnosed in France (eight cases, all but two on individual farms), Germany (five cases), Japan (28 cases together with deaths in eight neonatal foals on 19 premises), and the United States (five cases). Neurologic disease associated with EHV-1 was reported by France (one case), Germany (two cases), Switzerland (cases on several premises), and the United States (two cases). Respiratory disease caused by EHV-4 was confirmed by France (15 outbreaks), Germany (one case), Switzerland (indeterminate number on several premises), and the UK (four outbreaks on separate premises). The UK reported one case of EHV-4 abortion.

Two cases of equine coital exanthema (EHV-3) were confirmed in the United States (Kentucky).

Numerous cases of EHV-2 infection associated with signs of respiratory disease were reported in the United States, a few being dual infections with EHV-5.

Cases of equine arteritis virus infection were recorded by Germany (carrier stallion) and Switzerland (one case).

Canada and Germany reported equine infectious anemia. Four cases were confirmed on individual premises in two Western provinces in Canada, while three outbreaks were recorded in Germany.

Equine piroplasmosis was considered endemic in France and the United Arab Emirates, with isolated clinical cases in non-Thoroughbreds in the latter.

Germany reported contagious equine metritis in two non-Thoroughbred stallions on one premises.

Infection with Leptospira spp. was confirmed by France (one case of uveitis) and the United States (two cases of abortion).

The United States diagnosed six cases of nocardioform placentitis and abortion.

Salmonellosis was reported by Ireland (three cases), Switzerland (two cases of S. typhimurium), and the United States (eight outbreaks associated with Salmonella Group C3 strains).

Clostridial enteritis was recorded in the United States including isolated cases of C. perfringens Type A in foals, two cases of C. difficile, and one case of C. sordellii. The United States also reported cases of equine proliferative enteropathy in Thoroughbred foals in two states.

Two outbreaks of rotavirus infection were recorded in France.

A fatal case of Eastern equine encephalomyelitis was confirmed in a horse in Florida, United States.

Rhodococcal-related disease was reported as endemic in the United States, with at least 22 cases diagnosed.

Infection with Corynebacterium pseudotuberculosis was reported as endemic in the United States.

Ireland reported three cases of atypical myopathy.


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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