the term epidemiology is best defined as the study of
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Community Health HESI Practice Exam

1. The term 'epidemiology' is best defined as the study of:

Correct answer: B

Rationale: Epidemiology is the study of the distribution and determinants of health-related states in populations. Choice A is incorrect because epidemiology focuses on more than just causes but also on distribution and determinants. Choice C is incorrect as it specifically relates to public health and not just treatment and prevention. Choice D is incorrect as epidemiology is broader than just focusing on the healthcare system and its effectiveness.

2. A client is suspected of being poisoned and presents with symmetric, descending flaccid paralysis, blurred vision, double vision, and dry mouth. The nurse should consider these findings consistent with which potential bioterrorism agent?

Correct answer: B

Rationale: The correct answer is B: botulism toxin. Botulism toxin is associated with symmetric, descending flaccid paralysis, blurred vision, double vision, and dry mouth, which are consistent with the client's presentation. Ricin (Choice A) typically presents with gastrointestinal symptoms. Sulfur mustard (Choice C) is a blistering agent causing skin, eye, and respiratory issues. Yersinia pestis (Choice D) is associated with the bubonic plague, presenting with fever, malaise, and buboes.

3. What is the main objective of the Expanded Program on Immunization (EPI)?

Correct answer: C

Rationale: The main objective of the Expanded Program on Immunization (EPI) is to eliminate vaccine-preventable diseases. While providing healthcare to all individuals and reducing child mortality are important goals, the primary focus of EPI is specifically on preventing diseases through immunization. Promoting healthy lifestyles, although beneficial, is not the primary aim of the EPI.

4. Which of the following strategies is most effective in promoting breastfeeding in a community?

Correct answer: B

Rationale: The most effective strategy in promoting breastfeeding in a community is offering breastfeeding education and support. This helps mothers learn about the benefits of breastfeeding, gain confidence in their ability to breastfeed, and receive necessary support to overcome challenges. Providing formula samples (Choice A) can undermine breastfeeding efforts by promoting formula feeding over breastfeeding. Encouraging early weaning (Choice C) goes against the recommendation of exclusive breastfeeding for the first six months of life. Promoting bottle feeding (Choice D) can deter mothers from initiating or continuing breastfeeding, leading to decreased breastfeeding rates.

5. Tertiary prevention would best be described as:

Correct answer: D

Rationale: Tertiary prevention is the stage of prevention that aims at preventing disability and maximizing the use of remaining capacity. Choice A is more aligned with rehabilitation rather than tertiary prevention. Choice B refers to primary prevention by promoting health and preventing diseases. Choice C focuses on rehabilitation specific to alcohol and drug dependence, which is a form of secondary prevention, not tertiary prevention.

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