Equivac® S Strangles Vaccine is a cell free extract of the Streptococcus equi organism used in the control of strangles. Key Features: Convenient owner-administered protection of horses against this serious disease Convenient single dose syringe presentation Equivac® S Strangles Vaccine is of value only in the control of infection due to Streptococcus equi. (For control only: no value in the treatment of strangles). Pregnant mares may be vaccinated up to 2 weeks before foaling. By maintaining a regular vaccination program animals will retain a high level of circulating antibodies that will reduce the likelihood of a strangles outbreak occurring. Vaccination against strangles should be included as a part of every horse's vaccination program. The Equivac® range of vaccines is available from your veterinarian or most saddleries and feed stores.