Fig. 1

Temperature measurements during the first 24 h post-infectious feed recorded in each transmission experiment, in the three study rounds. There was significant variation in all temperature parameters during the first 24 h post-infectious feed between the three rounds: mean temperature (F_{(2, 85)} = 39.328, P < 0.0001), minimum temperature (F_{(2, 85)} = 41.749, P < 0.0001), maximum temperature (F_{(2, 85)} = 32.861, P < 0.0001) and the temperature range (F_{(2, 85)} = 36.57, P < 0.0001). Error bars show 95% confidence intervals of the means