| abstract |
The resistance of field-raised swine to dysentery infection is increased by a sequence of parenteral and oral administrations. First there is parenterally administered to the swine an injectable cell concentrate containing a virulent isolate of killed cells of Treponema hyodysenteriae, and not less than five days after the animals have received the first of the parenteral injections, a series of oral administrations of enteric-coated pellets is started, the pellets containing concentrated killed cells of a virulent isolate of T. hyodysenteriae. The oral administrations are given at least once every 24 hours for a period of at least five days. |