For what it's worth, Dee Lusby feels that properly rendered wax from AFB infected hives is perfectly suitable for use in hives and as foundation. Does it all the time, which is not to imply she has AFB in her hives all the time.
When I spoke to her about it recently, she mentioned holding it at 190 degrees F for a time in a hot water bath. She maintains that any AFB spores are embedded in the wax and that the bees don't eat the wax, they chew it and that miniscule amounts of AFB spores accidentally ingested by bees isn't a problem, as compared to AFB spores coming in contact with larva and mite-infested brood that are being chewed on. I didn't get into further discussion about it with her and I don't bring this up as a policy that I personally can or intend to defend. I just thought another perspective on this issue was worthwile voicing.
I don't have exact numbers in front of me but if you heat the wax up around 200 or 300 F for a short time it will kill the spores, as I understand it. Plus wax is not a very likely source for infection.
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