My kenya topbar hive has afb. I am going to burn all their comb and scorch the ktbh. None of my other 12 hives show any symptoms. The ktbh population was probably equal to a medium sized swarm, and they still had some early season honey, so I dont beilieve they were robbed at all. Should I treat all the other hives with teramyacin.? Odd that they would get afb. This is their first year and so all their comb is freshly drawn. Must have robbed out a neighbors hive, but in that case why didnt my other hives find it too? The only other things I did different with that hive is I shook out a split from them in mid season(maybe I chilled some brood that them spoiled and afb proliferated?) Also, that was the only hive that had a screened bottom, open to the air, without a drawer underneath. Thanks for any suggestions! Paul.