hmm...this is interesting, hurtin!
I was curious and took a little time to look Nosema up and found a german site about GM techniques. It says that bee's which are infected with this parasite and were fed with Mon810 maize pollen died shortly after.
It seems there is a connection here...
Anyway, thanks for posting this..maybe another piece of this huge puzzle?
Here's a bit info about GM and bees:
"Bees use maize pollen only when there are no alternatives." 
Nosema (comparasion of healthy and diseased honey bee gut)
The only positive way of identifying nosema disease is through the dissection of adult bees. The hind gut and digestive tract of diseased bees are chalky white or milky white. Healthy bees, on the other hand, have amber or translucent digestive tracts. In addition, the individual circular constrictions of a healthy bee's gut are visible, whereas the gut of an infected bee may be swollen and the constrictions may not be clearly visible.
Kat