http://www.medicalnewstoday.com/articles/203981.php

"Researchers in the US say they have found a unique combination of a
virus and a fungus that could explain Colony Collapse Disorder, a
mysterious illness that is wiping out beehive colonies around the world.

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."

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