13. Common-source infections are characterized by: A. Slow linear growth in a po

Question

13. Common-source infections are characterized by:

A. Slow linear growth in a population

B. Slow exponential growth in a population

C. Rapid onset in a population and rapid decline

D. Rapid onset in a population and steady occurrence

14. Epidemiological clues to the cause of an infectious disease include statistics on:

A. Age, geographic location, genetics, and sex of victim

B. Rate and pattern of spread through a population

C. Time of year

D. All of the above

15. What is one characteristic that helps identify S. aureus vs S. epidermidis?

A. gram stain

B. fermentation of mannitol

C. fermentation of lactose

D. salt tolerance

Please provide explanations.

Explanation / Answer

13. D. Rapid onset in apopulation and steady occurence.

Sexually transmitted diseases are example of common source desease.Rapid onset in population takes place and gradually they stabilise in the population.

14. D. All of the above ,

All above factors are important clues for epidemology of desease.

15. A. Gram staing.

Staphylococcus epidermis , Staphylococcus aureus are   gram positive bacterium s.

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