The International Collating Center, Newmarket, United Kingdom, and other sources reported the following disease outbreaks for the second quarter of 2013:
- Contagious equine metritis (CEM) was reported from Germany and the USA. The former diagnosed the disease on five premises. Three stallions and five mares (non-Thoroughbreds) were confirmed positive for Taylorella equigenitalis on culture and polymerase chain reaction (PCR). Of three infected Warmblood mares imported into Kentucky, USA, earlier in 2013, one gave birth to a healthy foal during the period under review that was culture negative for CEM. A 2-year-old Thoroughbred filly in Florida was confirmed positive for T. equigenitalis prior to export to Puerto Rico. Intensive investigation into the filly’s background has failed to identify the source of infection.
- Strangles was confirmed in Denmark (six horses on a premises), France (four outbreaks), Sweden (one outbreak) and the USA (endemic with outbreaks in numerous states including Kentucky, Maine, Texas and Wyoming).
- Equine influenza was reported from Sweden (two outbreaks of single cases), the UK (seven cases on one premises) and the USA (sporadic cases in at least 10 states). Equine arteritis virus was isolated from the semen of a carrier stallion in Germany.
- Equine herpesvirus-1 and -4 related diseases were recorded by Argentina, France, Germany, Japan, the UK and the USA. Equine herpesvirus-1 (EHV-1) respiratory disease was confirmed in France (two outbreaks), Germany (one outbreak), the UK (one outbreak) and the USA (outbreaks in Florida and Kentucky). Abortion caused by EHV-1 was reported from Argentina (two cases on one premises), France (single cases on five premises), Germany (four cases on three premises), Japan (14 cases in Thoroughbreds on seven premises), the UK (a single case), and the USA (single cases on two premises).
- EHV-1 neurologic disease was recorded in France (single case), the UK (single case), and the USA (outbreaks in New Jersey and New York, the latter involving four cases at a harness track).
- Equine herpesvirus-4 was associated with outbreaks of respiratory disease in Argentina (outbreaks on two premises involving 13 Thoroughbred foals), and France (12 outbreaks). France also reported a single case of abortion due to the virus.
- The USA recorded several cases of infection with equine herpesvirus-2 in Florida and Kentucky and numerous cases of equine herpesvirus-5 infection.
- Equine infectious anemia was reported from the USA, with 12 cases on a premises in Nebraska and one case in Texas.
- Reports of equine piroplasmosis were received from France (endemic, sporadic clinical cases), and the USA (19 cases of Theileria equi infection on six premises in southeastern Texas).
- Outbreaks of salmonellosis were reported by the USA involving Group B and Groups C1 and C2 salmonellae. The USA also recorded cases of Equine Monocytic Ehrlichiosis in Florida (two) and Kentucky (seven).
- Rotavirus was confirmed in France (five outbreaks) and Germany (one case). Clostridial enteritis was diagnosed in foals in several states in the USA. The USA also recorded a limited number of cases of enteropathy due to Lawsonia intracellularis.
- Leptospiral abortion was reported from Argentina (five cases on one premises). Isolated cases of nocardioform placentitis and abortion were confirmed in Kentucky, USA.
- Individual cases of Hendra virus infection were diagnosed on two premises in Queensland, Australia.
- The USA reported nine cases of Eastern Equine Encephalomyelitis involving Florida, Georgia and South Carolina, and single cases of West Nile Virus encephalitis in Ohio and Texas.
- Rabies was confirmed in the United Arab Emirates (two cases in non-Thoroughbreds) and the USA (two cases on separate premises).
- Germany recorded a case of Anaplasma phagocytophilum infection in a Warmblood mare. Rhodococcal disease was stated to be endemic in the USA, with only a percentage of outbreaks being reported.
*First Quarter Report for Australia
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