The Parasitology reference article from the English Wikipedia on 24-Jul-2004
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Parasitology

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Parasitology is the study of parasites. These can be animal parasites (such as toxoplasma or heartworms) or human parasites. However, many parasites can be transferred from animals to humans (zoonosis) or vice versa. Parasitologists study multicellular parasites such as ascaris lumbricoides or flukes or unicellular eukaryotes such as malaria or leishmaniasis. In general, prokaryotes fall under the field of bacteriology rather than parasitology.

See also: Veterinary Parasitology