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Similar term(s): pathogen.
Organisms, including bacteria, viruses or cysts, capable of causing diseases
(typhoid, cholera, dysentery) in a host (such as a person). There are many types
of organisms which do NOT cause disease. These organisms are called
US EPA Drinking Water Glossary, A Dictionary of Technical and Legal Terms
Related to Drinking
Although normally used to describe pathogenic organisms, the term 'pathogens'
may include other agents.