I read with interest the writings of Adrian Wenner and his findings of collapse of colonies due to Varroa due to heavy infestations of Chalkbrood. The thought occurred to me that I have seen heavy infestations of Varroa on my bees with six or more mites on each bee in the later stages of infestation. Is there the possibility that the adult mite makes it impossible for the bees to enter the cells due to increased mass and therefore restricts normal cleaning behavior resulting in Chalkbrood. Lets face it, if I suddenly found myself humpbacked, I might not fit into a body sized cavity either. Dennis A. Meeks Northeastern Indiana beekeeper and postal worker [log in to unmask]