> What do nosema counts of .05 million, 1.7 million. and .2 million mean? Are these serious infections?
According to Traver and Fell:
> While N. ceranae is a less prolific spore producer than N. apis, estimating 1 million spores per bee sample is a good threshold value to use when considering the need for colony treatment.
At the same time they say:
> Reliable threshold levels for N. ceranae treatment are still unknown.
Finally:
> Colony mortality due to N. ceranae infections does not appear to be a major factor in colony losses throughout the mid-Atlantic region. We do not feel that N. ceranae is a major factor associated with colony decline.
http://pubs.ext.vt.edu/ENTO/ENTO-66/ENTO-66-pdf.pdf
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