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
 
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Thomas W. Culliney                    *       Phone: (808) 973-9529
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