I used to be a small commercial beekeeper--and worked for a larger commercial beekeeper--we both bred our own queens and the consensus was that the best solution for nosema was to ensure that we bred from queens that never showed signs of the disease (over the course of several seasons). Any hive that showed signs of nosema were requeened. I'm new to beesource but have kept bees for at least 20 years; I'm just wondering if this continues to be the prevailing wisdom---geneically superior queens will eliminate concerns related to nosema.?