I am reasonably certain that the kind of comb you run has no correlation to whether or not you get CCD. I am reasonably certain that the beekeeping style is directly correlated to your chances of getting CCD. Migratory beekeeping greatly increases the bees exposure to everything. However, since most migratory beekeepers do not use natural comb, and more small isolated beekeepers do use natural comb, it would be easy to draw am incorrect correlation. I am also reasonably certain that once you get CCD, no matter what your comb is, the best solution is to start over with new equipment and new clean bees.
Roland
Roland