>> Samples were not checked for nosema ceranae. We did not even know at that time if N ceranae is north America.
The prevalence of N. ceranae was reported by Oct 2006:
Widespread dispersal of the microsporidian Nosema ceranae, an emergent pathogen of the western honey bee, Apis mellifera
Julia Klee, et al. Journal of Invertebrate Pathology 96 (2007) 1–10
Received 12 October 2006, Available online 12 March 2007
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