Nokea
Define the following terms: latency
- A. The time between exposure to a hazard and the onset of symptoms.
- B. The strength of a chemical bond.
- C. The period during which a disease is contagious.
- D. The duration of a clinical trial.
Correct Answer: A
Rationale: Latency refers to the delay between exposure to a harmful agent and the manifestation of health effects.
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Descriptive epidemiology is essential for 'characterizing the outbreak' by time, place, and person, but has little bearing on the analytic epidemiology.
- A. TRUE
- B. FALSE
Correct Answer: B
Rationale: Descriptive epidemiology informs the development of hypotheses tested in analytic studies.
Vibrio cholera are destroyed by all except
- A. boiling
- B. drying
- C. bleaching powder(1 mg/lit.)
- D. cresol
Correct Answer: D
Rationale: Cresol is not effective against Vibrio cholerae, while boiling, drying, and bleaching powder are effective methods for destroying the bacteria.
In Pneumoconiosis all are included except
- A. Asbestosis
- B. Silicosis
- C. Anthracosis
- D. Bagasosis
Correct Answer: D
Rationale: Bagasosis is not a type of pneumoconiosis; it is a respiratory condition caused by exposure to sugarcane dust.
When is initiating surveillance for a new public health problem justified?
- A. If it is a communicable disease with a high case-fatality rate.
- B. If the problem is new and systematically collected data are needed to characterize the disease.
- C. If a program at CDC has recommended its addition to better understand national trends and patterns.
- D. To guide, monitor, and evaluate programs to prevent or control the problem.
Correct Answer: D
Rationale: Surveillance is essential to guide and evaluate prevention and control strategies.
What is the prevalence of disease during July?
- A. 3 / 700
- B. 4 / 700
- C. 5 / 700
- D. 8 / 700
Correct Answer: C
Rationale: Prevalence includes all cases present at a given time.