Age and Season Effect the Timing of Adult Worker Honeybee Infection by .

The microsporidia is an intracellular parasite of honeybees' midgut, highly prevalent in colonies for which important epidemiological information is still unknown. Our research aimed at understanding how age and season influence the onset of infection in honeybees and its development in the colony environment. Adult worker honeybees of less than 24h were marked and introduced into 6 different colonies in assays carried out in spring and autumn.