Which of the following is used to reduce or eliminate the source of an infection?
A. Destruction of an animal reservoir of the infectious agent
B. Treatment of sewage to reduce water contamination
C. Destruction of vectors by spraying insecticides
D. All of the choices are used to reduce or eliminate the source of an infection.
Answer: D
You might also like to view...
A ratio of the dose of the drug that is toxic to humans versus the minimum effective dose for that pathogen is assessed to predict the potential for toxic drug reactions. This is called the ________.
A. Kirby-Bauer technique B. minimum inhibitory concentration (MIC) C. therapeutic index (TI) D. E-test E. antibiogram
Which of the following does NOT occur during mitosis?
A) condensation of the chromosomes B) replication of the DNA C) spindle formation D) separation of the spindle poles
The organisms responsible for the majority of primary production in marine environments are the copepods
Indicate whether the statement is true or false
The mass extinction at the end of the Cretaceous period was likely the result of:
a. rising seawater. b. loss of vegetation. c. extreme predation. d. a dramatic change in climate. e. the appearance of new competitors.