In Article 22 of bionet.parasitology, James Mahaffy (mahaffy at dordt.edu) writes:
> Are there any significant human parasites that are transmitted by
> leeches. I can't recall hearing of any, but the question came up in a
> general biology class and it appeared to me that a leech would be a good
> vector, but I haven't heard of any parasites that they transmit.
There is a brief commentary by Prof. Dr. Heinz Mehlhorn entitled
"Transmission of HIV by Leeches" in the journal (der) Hautarzt
Volume 44, No. 11: page 744 (November 1993).
parasite at zoo.toronto.edu
Area of Interest: ultrastructure
of protozoan parasites and nematodes