The International Collating Center, Newmarket, United Kingdom (UK), and other sources reported the following disease outbreaks for the second quarter of 2012:
- A report of contagious equine metritis was received from Germany involving two Icelandic mares.
- Outbreaks of Salmonella abortus equi infection were recorded in Argentina (11 abortions on one premises) and Japan (one case).
- Strangles was recorded in Germany (one case), Sweden (three premises), and the USA (Iowa, Kentucky, New York, Pennsylvania).
- Multiple outbreaks of equine influenza were confirmed in France in May and June. Initially, five outbreaks were recorded in French Saddlebreds and sports horses that had participated in several competitions. One 10-day-old foal died. Two unrelated outbreaks subsequently occurred at equestrian centers. Another separate case of influenza was confirmed in a non-vaccinated horse recently imported from Portugal.
- Equine herpesvirus-1 (EHV-1) related diseases were reported by Argentina, France, Germany, Japan, the UK, and the USA. Sporadic EHV-1 respiratory cases occurred in France and Germany, the UK, and the USA (California, Kentucky, Indiana, and Missouri). EHV-1 abortions were recorded in Argentina (one case), France (three cases on one premises), Germany (neonatal pneumonitis), Japan (11 cases in predominately vaccinated horses on 10 premises), and Sweden (three cases on two premises). Four cases of EHV-1 myeloencephalopathy were reported by Germany.
- Several cases of equine coital exanthema (equine herpesvirus-3) were reported from Kentucky. Equine herpesvirus-4 was reported in Queensland, Australia (one case) and France (nine premises). Infections with equine herpesvirus-2 (six cases in Kentucky) and EHV-5 (two cases in Florida) were diagnosed.
- Equine viral arteritis was reported by France (five outbreaks; two carrier stallions) and Germany (four Warmblood carrier stallions).
- Equine infectious anemia was reported by Argentina (seven horses in Buenos Aires Province), Germany (one imported mare from Eastern Europe), and Italy (38 cases since early 2012 on 30 different premises).
- Equine piroplasmosis was confirmed in France (endemic), Switzerland, United Arab Emirates, (endemic, sporadic clinical cases) and the USA. Some 18,600 horses have been tested in the USA since early 2012. Seropositive horses were confirmed, four infected with Theileria equi and two with Babesia caballi, the majority Quarter Horse racehorses.
- Thirty-five cases of Eastern equine encephalomyelitis were confirmed in the USA, with the largest numbers diagnosed in Florida (10), Mississippi (10), and Louisiana (eight). West Nile encephalitis was reported from Italy (one case in Sardinia) and the USA (three cases). A fatal case of Hendra virus infection was confirmed in Queensland, Australia.
- Tasmania, Australia, confirmed endemic Ross River virus infection and reported two presumptive cases of the infection — one horse with neurologic signs and the other horse with a stiff gait and difficulty in locomotion.
- In late April, vesicular stomatitis (serotype New Jersey) (17 premises in five counties) was rediscovered in New Mexico resulting in quarantine and restrictions.
- Germany and the USA recorded cases of rotavirus infection in foals — two foals in Germany and six cases in Kentucky. The USA also confirmed outbreaks of Clostridium perfringens type A diarrhea in foals, mostly in Kentucky. Salmonellosis was reported from the USA; a total of 25 cases were caused by untyped Salmonella species: 19 Group B; five Group C1; and one Group C2.
- The USA also confirmed cases of Potomac Horse Fever (Neorickettsia risticii), 17 in Kentucky and one in Oklahoma. Turkey reported three cases of leptospirosis. Switzerland confirmed one case of anaplasmosis (Anaplasma phagocytophilum) and three fatal cases of equine grass sickness, which all presented with colic. The Northern Territory, Australia, reported a case of suppurative bronchopneumonia caused by Burkholderia pseudomallei. Tyzzer’s disease (Clostridium piliforme) was diagnosed in a foal in Kentucky.
*First Quarter Report for Australia.
The cases were reported in the latest issue of Gluck’s Equine Disease Quarterly, funded by underwriters at Lloyd’s, London, brokers and their Kentucky agents.