ATI RN
Epidemiology Test Questions and Answers PDF Questions
Question 1 of 5
Indirect transmission includes which of the following? (Choose one wrong answer)
Correct Answer: A
Rationale: Indirect transmission involves vectors (B), vehicles (C), or fomites (D). Droplet spread (A) is direct, making it the wrong answer.
Question 2 of 5
To study the causes of an outbreak of aflatoxin poisoning in Africa, investigators conducted a case-control study with 40 case-patients and 80 controls. Among the 40 poisoning victims, 32 reported storing their maize inside rather than outside. Among the 80 controls, 20 stored their maize inside. The resulting odds ratio for the association between inside storage of maize and illness is:
Correct Answer: C
Rationale: Odds ratio = (32/8) / (20/60) = 4 / (1/3) = 12, indicating a strong association.
Question 3 of 5
A spot map must reflect numbers; an area map must reflect rates.
Correct Answer: B
Rationale: Spot maps show case numbers by location; area maps can show rates or numbers.
Question 4 of 5
Key sources of morbidity data include which of the following? (Choose one wrong answer)
Correct Answer: A
Rationale: Morbidity data come from discharges (B), labs (C), and reports (D). Environmental data (A) relate to exposure, not morbidity.
Question 5 of 5
Factors that influence a health department’s decision whether or not to conduct a field investigation in response to one or more cases of disease include: (Choose one wrong answer)
Correct Answer: C
Rationale: All factors (A, B, C, D) influence decisions; C is correct, so misinterpreted—none are wrong.