NIS 5 - Mac - Bloodhound PDF - found - but no action taken - now what?

NSI 5 is acting half baked on my Mavericks MacBook Pro.

 

it found LOTS of copies of the Bloodhound.20.PDF - but won't do anything about them.  The UI doesn't allow me to quarantine nor delete the trojan.  They appear to be in the Dropbox Cache.

 

Further, I couldn't find any mention of Bloodhound on any of these forums.

 

I must have missed several obvious things!  Any help out there for a Newbie?

 

Thank you!