A negative EIA test is required for horses imported into South Dakota. The state of North Dakota has entered into an agreement with South Dakota to waive EIA testing for movement between these states. South Dakota reported 8,277 horses tested for EIA in FY 2015, with no positive cases. The EIA testing program can be costly but it is important, as in June 2013, 12 horses in northwestern Nebraska tested positive. A national control program is being considered which would base equine movement requirements on regional/state risk of EIA.
To aid the industry in preventing the disease, the SDAIB will maintain voluntary test and vaccination records in the Pierre office. Should questions arise as to the vaccination status of a stallion, veterinarians and producers are encouraged to verify this information with the Animal Industry Board.
Potomac Horse Fever is sporadically found in South Dakota. It should be considered when horses present with diarrhea and depression. A vaccine is available and is used heavily in endemic areas of the United States. PHF is a reportable disease in South Dakota.
West Nile Virus (WNV) has become established is all states except Alaska and Hawaii. A small number of WNV cases continue to be diagnosed in the horse population. In the past year, a single unvaccinated horse was reported positive in Hamlin County. Vaccination is effective in preventing this disease.