Following this thread of how parasites affect there host is quite  
interesting.

It has been know for a long time that certain Insect pathogenic fungi  
cause "new" behaviors in infected hosts.  For example one Entomaphaga  
grilli, a fungi that infects grasshoppers, causes the infected host to  
climb.  The infected grasshoppers end up climbing & slowing down until  
many dead sporulating grasshoppers are waving around on blades of  
grass above a field.  This behavior assists the spread of new fungal  
spores as they rain down from above.

It is quite spectacular to see a field of grasshopper cadavers  
covering the tall grass of a field that is undergoing an epizootic.

Now it is thought that maybe the sick insects, feeling sick, try to  
orient to the sun to eliminate the infection by basking.  This has  
been shown because the elevated temperature is not advantageous to the  
fungus & assists the grasshoppers immune system to overcome the  
infection.

We still have a long way to go to really understand host/pathogen/ 
parasite interactions & how insects can detect & interact with  
themselves & their environment.  I'm betting that there is a lot more  
there than we think!

Mike

******************************************************
* Full guidelines for BEE-L posting are at:          *
* http://www.honeybeeworld.com/bee-l/guidelines.htm  *
******************************************************