Because dried scabs retain the infective virus, which is resistant to heat and cold and can survive from year to year once infection is established on a farm, it is advisable to vaccinate each new lamb and kid crop. Exposure to infection can occur during shipping. Range lambs moving into feedlots should be vaccinated at least 14 days before shipment to prevent possible rapid spread of the disease after arrival.
Normally only healthy animals should be vaccinated but experience has shown that in outbreaks of Sore Mouth vaccination of infected sheep and lambs tends to shorten the course of disease.
This is a live virus vaccine. Do not vaccinate within 21 days before slaughter, or within 24 hours of dipping or spraying.
Rehydrate with accompanying diluent just prior to use. Contents of the diluent vial may be withdrawn with a sterile syringe and needle, without removing the stoppers, and transferred to the bottle of dried vaccine. If a syringe is not convenient the aluminum seals may be removed and diluent poured into the vaccine bottle.
Shake well after rehydrating until the dried virus is completely dissolved. Live virus products contain a stabilizer that may slow rehydration slightly but complete liquefaction will take place within a few moments.