PLB wrote: "Tylosin, when properly applied, can be used to treat hives 
infected with AFB."

That may be so (it would be illegal here in the UK) but will do nothing 
to eliminate the spores which can remain viable for up to half a 
century, so I suspect it is a remedy recommended by the chemical 
companies looking to sell more.

However, some bees do have hygienic traits that enable them to deal 
with AFB and prevent it becoming a problem.  Roger Morse once told me 
that he had colonies of bees that he found impossible to infect with 
AFB!

Chris
  

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