• try typing the question in to the search box on or looking up parasites discovery on wikipedia.
  • There are different kinds of parasites, the most small of them, the Protozoa, "were first discovered by the man who actually invented the microscope, Anton van Leeuwenhoek. There are over 45,000 species of Protozoa. They cover the globe and are responsible for millions of cases of disease in both humans and animals." But many parasite caused diseases and sometimes parasites were known already for a long time, even if they did not know of their relation to diseases. Sources with some other useful information:

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