A disease-causing organism is known as:
a. a pathogen.
b. normal flora. c.
a germ.
d. a microorganism.
ANS: A
Infectious agents include any disease-causing agent and are called pathogens. They include bacteria, fungi, viruses, and parasites. Normal flora is a group of non-disease-causing microorganisms that live in or on the body. A microorganism is bacteria, fungi, or protozoa.
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