Peter Borst wrote: > However, I found a recent study on virulence of different strains of AFB > http://aem.asm.org/cgi/content/full/71/11/7551 I found that very interesting, thanks for the link. It would seem to have implications for anyone trying to develop hygienic bees, i.e. the removal of infected material could be due to a more virulent strain of the bacteria killing the larvae earlier, rather than the colonies ability to detect diseased larvae. Best wishes Peter Edwards [log in to unmask] www.stratford-upon-avon.freeserve.co.uk/ -- Visit www.honeybeeworld.com/bee-l for rules, FAQ and other info ---