Saturday, October 9, 2010

My Thoughts on Virues and Fungi cause CCD

Iridovirus and Microsporidian Linked to Honey Bee Colony Decline
Alright so it's been a few days since this came out. I have been reading it and have come to the conclusion that it's nothing too special. In short they took samples of bees from 2006 to 2009 (2010?) from CCD effected hives, and they've listed all the correlating combinations of viruses and fungi that seem to cause CCD. 

I'd be interested to know what the bees were pollinating? How were they coming into contact with these viruses and fungi spores? But unfortunately we probably don't know that much about the ones killing the bees in this case. 

We also observed Varroa mites in some, but not all of the CCD colonies.
Excuse me? You didn't find mites in all of the beehives? Okay either you're not looking hard enough or those hives recently re-queened or something. There are Varroa mites in every beehive! Drones which move freely from hive to hive (just droning on with their lives of one day mating or not) are just one way that Varroa mites enter the hive. Enlarged drone cells are often targeted by the mites too. 

These results support the correlation observed by the MSP data that suggests than an interaction between N. ceranae and an IIV-6-like virus may be involved in bee mortality.
Why isn't the bees immune system fighting back? 

I can see a definite drop here... but what is the correlation again? This chart seems to show that the Virus and the Nosema don't have to be together to cause CCD. It looks like they can kill bees well enough on their own.