On Thu, 8 Jun 1995, Marion D. Ellis wrote: > >Hi, > > > >Can anyone give me a journal(s) reference(s) for research into the minimum > >infective doses for European Foul Brood and American Foul Brood. > > > > Refer to Bee World: Vol. 74, No. 4, page 177, review article by Ratnieks > > "20 spores constitute an LD50 for one-day old larva, whereas millions of > spores are necessary to infect a 4-5 day old larva". > > > Marion Ellis, [log in to unmask] > Maybe I'm not up on the latest, up-to-the-minute information, but it was my understanding that the causative organism of EFB (Melissococcus pluton) is a non-spore-forming bacterium. If so, how could the above LD50 (or should that be LC50) have been arrived at? Please clue me in. Tom =============================================================================== Thomas W. Culliney * Phone: (808) 973-9529 Hawaii Dept. of Agriculture * Facsimile: (808) 973-9533 Division of Plant Industry * E-mail: [log in to unmask] 1428 South King Street * Honolulu, Hawaii 96814 * U.S.A. * =============================================================================== "...but in the minds of most men, the learned as well as the vulgar, the idea of the trifling nature of his pursuit is so strongly associated with that of the diminutive size of its objects, that an _Entomologist_ is synonymous with every thing futile and childish."--Kirby & Spence (1816) ===============================================================================