Via Erik Osterlund in the BiologicalBeekeeping list:
http://www.cf.ac.uk/biosi/research/biodiversity/staff/bnd.html
Scroll down the page and read the research project summaries.
Among others:
"Development of a biological control method for the
prevention and /or treatment of foulbrood in honey bees"
--
Anthony N Morgan,
Førsteamanuensis
Institutt for Elektroteknikk
Høgskolen i Sør-Trøndelag
N-7005 Trondheim, Norway
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Tlf. 73 55 96 04
Fax. 73 55 95 81