Extract from Sophos
"Bloodhound is not the name of a virus, but a message displayed by Symantec's Norton Anti-Virus when it thinks it may have found a new virus."
Full text can be found
here
Recommend you scan using an alternate AV program (many evaluation versions are available for download) such as
Sophos,
Norman or Trend Micro as recommended above.
Remember any AV program is only any good if it has been recently updated - new virus definitions are released almost daily.