Which example contains the components necessary to form an epidemiologic triangle?
a. Pesticides, water, food
b. Lead, mercury, soil
c. Trichloroethylene, water, infants
d. Children under 12, elderly, temperature
ANS: C
The epidemiologic triangle consists of an agent (chemical), host (community consisting of several variants), and environment (air, water, soil, etc.). The other examples do not contain an agent, host, and environment.
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