10.1371/journal.pone.0163522.g001 Cameron J. Jack Cameron J. Jack Hannah M. Lucas Hannah M. Lucas Thomas C. Webster Thomas C. Webster Ramesh R. Sagili Ramesh R. Sagili Prevalence of <i>Nosema ceranae</i> infection in samples of known-age bees (marked) and mixed age background bees. Public Library of Science 2016 colony Level Prevalence honey bee age ceranae infection honey bee colonies infection dynamics hypopharyngeal gland protein content cohort nucleus colonies gut pH ceranae infection prevalence values marked-bee age cohorts ceranae infection dynamics colony level 2016-09-22 17:33:17 Figure https://plos.figshare.com/articles/figure/Prevalence_of_i_Nosema_ceranae_i_infection_in_samples_of_known-age_bees_marked_and_mixed_age_background_bees_/3852321 <p>Shown are mean ± SE <i>Nosema ceranae</i> infection levels of marked bees and background bees at each age group/sampling event. Marked bees were recently emerged bees at the first sampling event, nurse-aged bees at the second sampling event and forager-aged bees when the third sample was taken. Mean infection prevalence between marked (known-age) and background (unknown, mixed-age) bees on corresponding collection days were not significantly different (P > 0.05). Mean prevalence of infection was significantly higher in marked bees sampled on date 3 than on dates 1 and 2, indicated by different letters (P = 0.0043).</p>