I have found it in packages in the past, but have no way to say YES THIS CAME with the bees... The first time it happened I moved them to another outyard and put them on NEW foundation with Terra Pro and syrup... Burned the frames they were on. The second time I treated three times with Terra pro and it was gone.. I can pretty much pop the top on a hive now, and tell by the faint ammonia/fishy smell if they have EFB, before I see the yellow larvae.
May I ask, WHY do you replace the queen? Is she the carrier of the disease?