No parasites in leeches?

[James F Gilliam]

Actually, I mean 'no pathogens transmitted to humans by leeches?,' but 
that was too long.

I once read in an airline magazine that no leech is known to act as a 
vector for a human disease.  Is this true?  Are any leeches vectors for 
pathogens for other species?

--
Jim Gilliam
james_gilliam at ncsu.edu (preferred) or jfgzo at unity.ncsu.edu
Department of Zoology
North Carolina State University
Raleigh, NC 27695-7617