The nurse is preparing a teaching plan for a group of clients who were found to be HIV positive within the last year. Members of the group express an interest in learning about the pathology of AIDS.
The nurse should explain that HIV acts in which way to suppress the immune system?

Proliferation of suppressor T-cells.

Deficiency of cytotoxic T-cells.

Increase in B-lymphocytes and IgM.

Destruction of helper T-cells and CD4 cells.

Answer and Explanation

The Correct Answer is D

Choice A rationale:

Incorrect. Suppressor T-cells (also known as regulatory T-cells) play a role in regulating the immune response, but their proliferation is not the primary mechanism by which HIV suppresses the immune system. In fact, HIV can disrupt the function of suppressor T-cells, leading to an impaired ability to control immune responses.

Choice B rationale:

Incorrect. Cytotoxic T-cells (also known as CD8+ T-cells) are important for killing infected cells, but their deficiency is not the direct cause of immune suppression in HIV. However, HIV can indirectly lead to a deficiency of cytotoxic T-cells by disrupting their production and function.

Choice C rationale:

Incorrect. B-lymphocytes produce antibodies, and IgM is an early antibody produced in response to infection. However, an increase in B-lymphocytes and IgM is not characteristic of HIV infection. In fact, HIV can impair B-cell function, leading to decreased antibody production.

Choice D rationale:

Correct. HIV primarily targets and destroys helper T-cells (also known as CD4+ T-cells). These cells play a crucial role in coordinating the immune response by activating other immune cells, such as cytotoxic T-cells and B-cells. The depletion of helper T-cells leads to a progressive weakening of the immune system, rendering the body vulnerable to opportunistic infections and cancers.

Specific mechanisms of CD4+ T-cell destruction by HIV:

Direct infection and lysis: HIV can directly infect CD4+ T-cells and replicate within them, eventually leading to the death of the infected cells.

CD4+ T-cell apoptosis: HIV can induce programmed cell death (apoptosis) in CD4+ T-cells through various mechanisms, including the activation of pro-apoptotic pathways and the disruption of anti-apoptotic signals.

Immune dysregulation: HIV infection can also dysregulate the immune system, leading to chronic inflammation and immune activation. This can further contribute to CD4+ T-cell depletion and dysfunction.

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Correct Answer is C

Explanation

Rationale for Choice A:

Serum Helicobacter pylori (H. pylori) antibody results are not directly relevant to the diagnosis or management of acute pancreatitis. While H. pylori infection can cause gastritis and peptic ulcers, it is not a common cause of pancreatitis.

Urine output amounts are important to monitor in patients with pancreatitis to assess for dehydration and kidney function. However, they are not as specific to the diagnosis of pancreatitis as other findings.

Rationale for Choice B:

Reports of chronic constipation are not typically associated with acute pancreatitis.

Serum gastrin levels are used to diagnose conditions such as Zollinger-Ellison syndrome, which is characterized by excessive acid production in the stomach. They are not relevant to the diagnosis of pancreatitis.

Rationale for Choice C:

Severity of nausea and vomiting are key symptoms of pancreatitis. The severity of these symptoms can help to gauge the severity of the pancreatitis and guide treatment decisions.

Serum amylase results are a highly sensitive and specific marker for pancreatitis. Elevated levels of amylase in the blood strongly suggest the presence of pancreatitis.

Rationale for Choice D:

Presence of bowel sounds can be variable in patients with pancreatitis and are not always reliable indicators of the severity of the condition.

Degree of abdominal pain is a subjective symptom that can be difficult to assess accurately. While it is an important symptom of pancreatitis, it is not as objective as other findings such as serum amylase levels.

Therefore, the most valuable information to report to the healthcare provider in this case is the severity of nausea and vomiting and serum amylase results.

A. Pneumonia B. Tuberculosis C. Bronchitis D. Pulmonary Embolism

Correct Answer is A

Explanation

Choice A rationale:

Pneumonia is the most likely diagnosis given the rapid development of pulmonary infiltrates within a 24-hour period. Pneumonia is an infection of the lungs that can be caused by bacteria, viruses, or fungi. It typically presents with symptoms such as fever, cough, shortness of breath, and chest pain. The presence of pulmonary infiltrates on imaging studies, such as a chest X-ray, is a key diagnostic feature of pneumonia.

The distribution of the infiltrates, involving the lower lobes with a predominance on the right side, is also consistent with pneumonia. This is because the lower lobes are more susceptible to pneumonia due to their anatomy and gravity.

The absence of active processes on Day 1 makes other diagnoses less likely. For example, tuberculosis typically develops more slowly over weeks or months, and bronchitis usually does not cause pulmonary infiltrates.

Pulmonary embolism can cause pulmonary infiltrates, but it would typically be associated with other symptoms such as sudden onset of shortness of breath, chest pain, and tachycardia.

Choice B rationale:

Tuberculosis is a chronic infection that typically develops slowly over weeks or months. It is less likely to cause rapid development of pulmonary infiltrates as seen in this case.

Tuberculosis often involves the upper lobes of the lungs, and it may be associated with other symptoms such as fever, night sweats, and weight loss.

Choice C rationale:

Bronchitis is an inflammation of the bronchi, the large airways that carry air to the lungs. It typically causes a cough, but it does not usually cause pulmonary infiltrates.

Bronchitis is often caused by a virus, and it usually resolves on its own within a few weeks.

Choice D rationale:

Pulmonary embolism is a blockage of a pulmonary artery, one of the blood vessels that carries blood to the lungs. It can cause pulmonary infiltrates, but it would typically be associated with other symptoms such as sudden onset of shortness of breath, chest pain, and tachycardia.

Pulmonary embolism is often caused by a blood clot that travels from a vein in the leg to the lungs.

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The nurse is preparing a teaching plan for a group of clients who were found to be HIV positive within the last year. Members of the group express an interest in learning about the pathology of AIDS.The nurse should explain that HIV acts in which way to suppress the immune system?

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Naxlex Comprehensive Predictor Exams

Correct Answer is C

Explanation

Patient Data shows that on Day 1, there were no active processes.On Day 2, there were small bilateral lower lobes pulmonary infiltrates with the right lower lobe showing increased involvement compared to the left side.What is the likely diagnosis?

Correct Answer is A

Explanation

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The nurse is preparing a teaching plan for a group of clients who were found to be HIV positive within the last year. Members of the group express an interest in learning about the pathology of AIDS.
The nurse should explain that HIV acts in which way to suppress the immune system?