The probability of protection against congenital neosporosis, expressed in probit values that are plotted against the log
immunising doses of Nc-Spain 1 H tachyzoites in the dose-protection study. The fitting line represents a probit link function that estimates the expected probabilities of protection after immunisation with various doses of live Nc-Spain 1 H tachyzoites (log10). The percentages represent the protection rate against congenital neosporosis (no. of pups that remained healthy with no parasites detected in the samples until the end of the experiment/no. of analysed pups).