A paper on their findings was published online on 6 October in the journal PLoS ONE.
First author Dr Jerry Bromenshenk, a bee expert and biology research professor, at the University of Montana (UM) Division of Biological Sciences in Missoula, said in a statement that they don't know for sure if the two pathogens, a fungus called Nosema ceranae and a virus called insect iridescent virus (IIV), cause Colony Collapse Disorder (CCD), or whether the colonies with CCD are more susceptible to them.
"It's a work in progress, but it may be the most important advance in the search for the cause of CCD in the previous three years," said Bromenshenk."