I hope this is still relevant.  I got distracted by other pressing matters -
including a weekend!  This is what Trevor referred to.

Peter Dillon asked about potential dangers when wintering bees indoors.  In
March of 1995 Gauvreau, Sigler and Abbott published "Assessment of Airborne
Molds as a Biological Hazard for Alberta Commercial Beekeepers."  Gauvreau
is a veterinarian and Sigler and Abbott are at the University of Alberta's
Microfungus Collection.  Sixteen Alberta beekeepers co-operated in the test.

The report provides an impressive list of 82 molds that were collected
during the study.  It appears that some of the molds were innocuous but
others had the potential to cause severe problems for anyone exposed.

A couple of the statements from the report:

"The presence of known toxigenic, potentially pathogenic and allergenic
molds at all sites suggests that prudent action is needed to minimize worker
exposure"

"There appears to be a strong association between reported respiratory
symptoms, eye, nose and throat irritation and the activities monitored
(sweeping and Cleaning) where there was exposure to high levels of airborne
molds".

I suspect that copies of the full report would be very difficult to find but
I wrote an article on the report that may be easier to find.  The  article
is entitled "Danger in the Honeyhouse" and it appeared in the June 1995 copy
of Alberta Bee News as published by the Alberta Beekeepers Association.

Kenn Tuckey
Provincial Apiculturist
Alberta, Canada.