I'll go out on a limb here, and not having read the study or the book and just having a general impression, reveal my ignorance.

But, I ask, is this not just one study in one yard, in one country, by one researcher, with one type of bee, probably one strain of AFB, one climate, one environment, etc, long ago, that conveniently proves what everyone wants to believe? 

Has this been replicated elsewhere? By whom and where?

How about the experience of many commercial beekeepers that seems to indicate differently?

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