a child and his family were exposed to mycobacterium tuberculosis about 2 months ago to confirm the presence or absence of an infection it is most imp
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Community Health HESI Practice Exam

1. A child and his family were exposed to Mycobacterium tuberculosis about 2 months ago. To confirm the presence or absence of an infection, it is most important for all family members to have a

Correct answer: D

Rationale: The PPD (purified protein derivative) intradermal test is the standard screening method for detecting tuberculosis infection. It helps identify individuals who have been infected with Mycobacterium tuberculosis. A chest x-ray (Choice A) is used to assess the extent of active disease, not for screening purposes. Blood culture (Choice B) is not typically used for tuberculosis screening. Sputum culture (Choice C) is used to confirm active tuberculosis in symptomatic individuals, not for initial screening purposes.

2. Environmental sanitation is the primary problem in community Y. As a stranger to the health unit, one of the major strategies in your plan is the improvement of the environmental health conditions of the community. To indicate this, which of the following would you do?

Correct answer: C

Rationale: In this scenario, requesting mayors to create a task force is the most effective strategy to improve environmental health conditions in the community. Engaging with local government officials ensures the allocation of resources, coordination of efforts, and the implementation of sustainable solutions. While meeting with youth officials, parents' group leaders, religious and educational leaders are important, involving mayors in creating a task force will lead to broader community involvement and support. Informing local announcers about the project, although helpful for awareness, is not as impactful as engaging with local authorities for tangible change.

3. The public health RN is called to investigate a report of several cases of varicella at a daycare center. The daycare workers state that 5 children have been sent home over the past 2 weeks with fever and itchy blisters. Which intervention should the RN implement first?

Correct answer: A

Rationale: The correct answer is to validate that the children who were sent home had chickenpox. This is crucial in confirming the presence of varicella, which is necessary for appropriate management and control of the outbreak. Option B is not the first intervention because the focus initially is on verifying the cases within the daycare center. Option C is incorrect as it suggests a prolonged exclusion period without confirming the diagnosis. Option D is inappropriate and potentially harmful, as sending a child back without proper assessment can lead to further spread of the infection.

4. The RN is making a home visit to a female client with end-stage heart disease. She has a living will and states she will never go back to the hospital. During the visit, the RN notes that the client is pale and SOB while speaking. The RN discovers 3+ edema in both ankles and bilateral pulmonary crackles. Which intervention should the RN implement first?

Correct answer: B

Rationale: Obtaining a peripheral O2 saturation reading is the priority intervention in this scenario. It helps assess the client's oxygenation status quickly, which is crucial in a client with signs of respiratory distress, such as shortness of breath and bilateral pulmonary crackles. Ordering a chest X-ray (Choice A) may be necessary later but does not address the immediate need for oxygen assessment. Obtaining an order for a complete blood count (Choice C) is not the priority in this situation as it does not directly address the client's respiratory distress. Instructing the patient to stay in bed (Choice D) does not address the underlying issue of potential hypoxia and respiratory compromise.

5. Which of the following measures the proportion of the population that exhibits a particular disease at a particular time and includes both new and old cases?

Correct answer: D

Rationale: The correct answer is D, prevalence ratio. Prevalence ratio measures the proportion of the population with a particular disease at a specific time, including both new and existing cases. Choice A, proportionate morbidity rate, is not a standard term and might confuse students. Choice B, case fatality rate, measures the proportion of deaths from a specific disease compared to the total number of cases but does not include both new and old cases. Choice C, incidence ratio, measures the rate of new cases of a disease in a specific population over a defined period, not considering existing cases.

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