A new study by a team of nine Spanish researchers, published by "Environmental Microbiology Reports", has conducted research that suggests that there is a relatively simply cause of Bee Colony Collapse.  Their research indicates that the parasitic fungi Nosema ceranae (Microsporidia), was the cause; the solution was treatment with fumagillin, an antibiotic.  It seemed to do the trick, leading to complete recover of infected colonies.

Colony Collapse Disorder has been of concern to people paying attention to the sudden decline of bee hives due to a thus-far unexplained cause.