Certainly dysentery can be caused by other things than Nosema - feeding on  
sweets that have too much solid matter for example. 
 
What is the time table for N. Cerana in killing the bee?  With N.Apis  the 
bee's lifespan might be shortened by just a few days (which might be enough  to 
make the difference between a hive being profitable or not). Does N. ceranae  
kill that much quicker?
 
Chris
 

*******************************************************
* Search the BEE-L archives at:                       *
* http://listserv.albany.edu:8080/cgi-bin/wa?S1=bee-l *
*******************************************************