Figure 1. Intensity of C. bombi infections in bumblebees that received either a nicotine diet (Experimental bees, n = 20) or a sucrose only diet (Control bees, n = 20).

Faeces were checked after 7 days and 10 days post inoculation. Box plots show medians, 25 ^th and 75 ^th percentiles (** P < 0.001; * P = 0.001).