Foetal survival curves. Foetal survival curves from intravenously challenged animals (A) and from IV and SC challenged animals with 104 Nc-Spain7 tachyzoites (B). Each point represents the percentage of surviving animals on that day, and downward steps correspond to observed deaths. Foetal survival curves were compared by the log-rank (Mantel–Cox) test. For significant differences between foetal survival curves of infected groups, (*) indicates P < 0.05.