Honeybee virus prevalence across the <i>Varroa</i> front of infestation.

<p>Pathogen prevalence across the front of infestation, in bee samples and <i>Varroa</i> mite samples. The percentage of colonies assigned positive for each of the seven viruses monitored is compared between <i>Varroa</i>-free areas for bee samples (white bars, n = 39), <i>Varroa</i>-infested areas for bee samples (black bars, n = 75), and <i>Varroa</i> mite samples (grey bars, n = 34). Stars indicate significant differences between proportions (Chi-square, p<0.05). Viruses are presented in decreasing order of prevalence. The average pathogen prevalence in bee samples across all regions sampled is indicated on the x-axis below the pathogen acronym.