Production of microsporidian spores in honey bees treated with varying concentrations of fumagillin.

Midgut tissues of five bees were homogenized for each sample. Counts from day 10 to day 20 post inoculation were averaged.*Spores observed were below the detectable number for the Petroff-Hauser counting chamber.**Dead bees or fewer than five bees available at the last sampling were not counted.aSignificantly lower spore production than positive control (difference among trials was used as a cofactor).bSignificantly higher spore production than positive control (difference among trials was used as a cofactor).