Re: European Foulbrood in Baits hives
You may find this reference useful:
Here's a small portion of the page from the link above:
European foulbrood disease is considered to be more problematic in situations where forage nectar is sporadic, or other situations that result in fewer nurse bees in colonies to feed larvae. At the onset of nectar flow in early spring, forage recruitment of house bees may increase rapidly resulting in few bees in colonies to feed honey bee larvae. Often, when the nurse bee to larvae ratio stabilizes later in the season, or remains stable throughout a season, symptoms disappear. However, this disease can occur throughout a season and will sometimes not clear up on its own. In severe cases, colony death can occur. Also, yearly reoccurrence of EFB from contaminated combs and equipment can occur. The bacteria that causes EFB does not produce spores, but combs contaminated with the bacteria can still reinfect honey bees in subsequent years.
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