any parasitic sporozoan protozoan of the genus Cryptosporidium, species of which are parasites of birds and animals and can be transmitted to humans, causing severe abdominal pain and diarrhoea (cryptosporidiosis)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
A genus of parasitic coccidian protozoans that infect the epithelial cells of the gastrointestinal tract in vertebrates and flourish in humans under conditions of intense immunosuppression.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.