Hunter, Pamela; Van der Lugt, Jaco J.; Gouws, J.J.; Verwoerd, Daniel Wynand(Published by the Government Printer, Pretoria., 1990)
The immunity conferred by an A. pyogenes bacterin-toxoid was evaluated in sheep, using an intravenous challenge system. Three sheep were vaccinated and 3 served as controls. The vaccinated sheep were not protected against ...
