| higher prevalence and levels of nosema ceranae than nosema apis infections in canadian honey bee colonies. | this study was conducted to determine the prevalence and infection levels of the microsporidia fungi nosema apis and/or nosema ceranae in honey bee colonies of two canadian provinces. three surveys were conducted in the springs of 2008, 2010 and 2012 and pcr identification of nosema species were performed in samples from 169 and 181 ontario colonies and from 76 alberta colonies that tested positive to nosema spp. infection levels of positive colonies were determined by microscopy and analyzed by ... | 2016 | 26358102 |