Cryptosporidium spore
"Cryptosporidium is a microscopic parasite that causes the diarrheal disease cryptosporidiosis. There are many species of Cryptosporidium that infect animals...its protective outer shell allows it to survive outside the body for long periods of time, and also makes it very tolerant to chlorine disinfection. While this parasite can be spread in several different ways, water (drinking water and recreational water) is the most common way to spread the parasite. Cryptosporidium is a leading cause of waterborne disease among humans in the United States." CDC.

USDA. National Agricultural Library.

View the results of a dynamic search of NAL's PubAg database for articles, and AGRICOLA books, on the cryptosporidium parasite.

USDA. Agricultural Research Service.

To facilitate identification through illustration, provides a brief description of parasites, hosts, transmission, and the pathogenesis of protozoans and includes simplified life-cycle drawings.

Environmental Protection Agency

Outlines special public health needs and precautions relating to Cryptosporidium for HIV/AIDS, cancer and transplant patients taking immunosuppressive drugs, and people born with a weakened immune system.  Archived document.

Kansas State University. Division of Biology.

Lists publications from Kansas State covering biochemistry, molecular biology and related topics.

Cornell University. Purdue University. U.S. Department of Agriculture’s Working Group on Water Quality.

A fact sheet in question and answer format produced by Cornell Cooperative Extension and sponsored by the USDA Working Group on Water Quality. Free download of pdf.

DHHS. Centers for Disease Control and Prevention.

Includes information on the organism's biology, its risks and prevention and control.

USDA. Agricultural Research Service.

"Conducts research for the understanding of how pathogens are disseminated on farms, in the environment, and to food products, and for the development of methods to detect, characterize and mitigate contamination to prevent foodborne illnesses."