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	Friday Quiz: How many diseases afflict humanity?   (February 3, 2006) Friday Quiz: How many diseases afflict humanity? There are about 1450 different species of human pathogen (disease-causing organism - bacteria, viruses, ameboids, plasmodiums, spirochaetes (example: lyme disease), etc.) were known, with many of them having a wide variety of "strains" or varieties. 60% of them can be contracted from animals, while the remaining 40% are associated only with humans. * * * copyright © 2006 Charles Hugh Smith. All rights reserved in all media. I would be honored if you linked this wEssay to your site, or printed a copy for your own use. * * *
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