Well, I would assume that the pathogen would kill only localy, spreading in a limited zone, I suppose, as to her re-apparition, well, since they are collective that thinks and acts pretty much like a very advance self-sufficient ego-maniac computer, I suppose it understands very well the necessity of -BACK-UP-! And so, with a ''save'' of the last ''functionnal'' queen, they would simply have to ''rebuild'' one. o-o