After a few hours in their home the new bees began an aerial assault by defecating all over the new hive boxes, and continued doing so the following day. We are hoping it is not nosema apis and just a result of the stress caused during transport, and also from being confined first to the packet and now the hive due to the rain. However we started treating with Fumagilin-B, along with the initial colony as a preventative measure.
Very disconcerting to see the mess these little buggers can make in a day. If they do not show signs of improvement in the next five days we are going to test some samples for nosema and, if present, eradicate the colony to prevent it from spreading.