HIV: Etiology, Pathophysiology, and Manifestations
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Questions and Answers

HIV primarily targets which type of cells in the human body?

  • Red blood cells
  • Platelets
  • CD4+ T cells (correct)
  • B cells

Which of the following is NOT a common mode of HIV transmission?

  • Unprotected sex
  • Hugging (correct)
  • Sharing needles
  • Perinatal transmission

What is the normal range for CD4+ T cell count in a healthy individual?

  • 800 to 1200 cells/μL (correct)
  • 1200 to 1600 cells/μL
  • 400 to 600 cells/μL
  • 200 to 400 cells/μL

Which diagnostic test is used to confirm a positive initial HIV screening test?

<p>Western blot (C)</p> Signup and view all the answers

What is the main goal of antiretroviral therapy (ART) in HIV treatment?

<p>To suppress viral replication and maintain CD4+ T cell counts (A)</p> Signup and view all the answers

Which of the following is an example of an opportunistic infection commonly seen in individuals with AIDS?

<p>Pneumocystis jirovecii pneumonia (PCP) (C)</p> Signup and view all the answers

What is the purpose of pre-exposure prophylaxis (PrEP)?

<p>To prevent HIV infection in high-risk individuals (C)</p> Signup and view all the answers

Which nursing intervention is most important for promoting adherence to ART in patients with HIV?

<p>Educating patients about the importance of adherence and potential side effects (D)</p> Signup and view all the answers

What is the significance of viral load testing in HIV management?

<p>It measures the amount of HIV RNA in the blood, indicating disease progression and response to treatment. (B)</p> Signup and view all the answers

Which of the following is a psychosocial consideration for patients living with HIV?

<p>Social stigma and discrimination (D)</p> Signup and view all the answers

After potential exposure to HIV, what does post-exposure prophylaxis (PEP) involve?

<p>Taking ART medications to prevent infection (A)</p> Signup and view all the answers

Which opportunistic infection is characterized by lesions on the skin and is commonly associated with AIDS?

<p>Kaposi's sarcoma (C)</p> Signup and view all the answers

What is the primary mechanism by which HIV weakens the immune system?

<p>Destruction of CD4+ T cells (B)</p> Signup and view all the answers

Why might older adults with HIV be diagnosed later in the course of the disease?

<p>Age-related changes mask the symptoms of HIV. (B)</p> Signup and view all the answers

Which of the following ART drug classes prevents HIV from converting its RNA into DNA?

<p>Nucleoside reverse transcriptase inhibitors (NRTIs) (C)</p> Signup and view all the answers

Which of the following recommendations should be included in the education of a client with HIV regarding prevention of transmission?

<p>Consistent and correct use of condoms during sexual activity. (C)</p> Signup and view all the answers

Which ART drug class works by blocking the HIV enzyme that cuts long chains of viral proteins into smaller proteins that are needed to assemble new virus particles?

<p>Protease Inhibitors (PIs) (C)</p> Signup and view all the answers

Which of the following findings would suggest that HIV treatment is effective?

<p>Decreased viral load, increased CD4+ T cell count (D)</p> Signup and view all the answers

A nurse is providing discharge instructions to a client with HIV. What statement made by the client indicates a need for FURTHER teaching?

<p>&quot;I don't need to worry about telling anyone I have HIV because my viral load is undetectable.&quot; (A)</p> Signup and view all the answers

A patient with HIV is diagnosed with Pneumocystis jirovecii pneumonia (PCP). Which medication is MOST likely to be prescribed?

<p>Trimethoprim-sulfamethoxazole (TMP-SMZ) (A)</p> Signup and view all the answers

Which of the following statements about HIV transmission is MOST accurate?

<p>HIV transmission requires direct contact with specific body fluids from an infected person. (A)</p> Signup and view all the answers

An older adult with HIV is experiencing increased fatigue and muscle weakness. Which of the following interventions is MOST appropriate for the nurse to implement?

<p>Assess for other potential causes of fatigue, such as anemia or medication side effects. (B)</p> Signup and view all the answers

A patient newly diagnosed with HIV expresses feelings of shame and isolation. Which of the following nursing interventions is MOST important?

<p>Creating a supportive and non-judgmental environment for the patient to express their feelings. (C)</p> Signup and view all the answers

A research study is evaluating the effectiveness of a new antiretroviral drug. Which of the following outcome measures would provide the STRONGEST evidence of the drug's efficacy?

<p>A statistically significant increase in CD4+ T cell count and a decrease in viral load compared to the placebo group. (D)</p> Signup and view all the answers

Which statement BEST describes the relationship between HIV and AIDS?

<p>HIV is the virus that causes AIDS; AIDS is the advanced stage of HIV infection. (A)</p> Signup and view all the answers

A pregnant woman with HIV is concerned about transmitting the virus to her baby. What is the MOST effective intervention to reduce the risk of perinatal transmission?

<p>Avoiding breastfeeding and undergoing elective cesarean delivery in conjunction with ART. (C)</p> Signup and view all the answers

A patient with HIV has been taking ART consistently for several years, and their viral load has been undetectable for the past two years. What is the MOST accurate statement regarding their ability to transmit HIV to others?

<p>The risk of transmission through sexual contact is essentially zero, but other precautions should still be taken. (D)</p> Signup and view all the answers

A public health nurse is developing an HIV prevention program for adolescents. Which of the following strategies would be MOST effective in reducing the spread of HIV in this population?

<p>Providing comprehensive sex education that includes information about safe sex practices, PrEP, and regular HIV testing. (A)</p> Signup and view all the answers

A patient with HIV is also diagnosed with tuberculosis (TB). Which of the following considerations is MOST critical when managing their treatment?

<p>Starting both ART and TB medications simultaneously, while closely monitoring for drug interactions, especially with rifampin-based TB regimens. (A)</p> Signup and view all the answers

Which of the following laboratory results would be MOST concerning in a patient with HIV who is receiving ART?

<p>A decreasing CD4+ T cell count despite consistent ART adherence and a rising viral load. (D)</p> Signup and view all the answers

A nurse is caring for a patient with HIV who is experiencing significant diarrhea. Which of the following interventions would be MOST appropriate to manage this symptom?

<p>Administering anti-diarrheal medications and encouraging the patient to maintain adequate hydration and electrolyte balance. (C)</p> Signup and view all the answers

An individual who is HIV-negative is considering starting pre-exposure prophylaxis (PrEP). Which of the following statements is MOST important for the nurse to emphasize during patient education?

<p>&quot;PrEP requires consistent daily adherence and regular follow-up appointments for HIV testing and monitoring.&quot; (B)</p> Signup and view all the answers

A researcher aims to identify novel drug targets for HIV therapy. Which molecular process, if inhibited, would MOST effectively prevent the integration of HIV DNA into the host cell genome?

<p>Integrase activity (C)</p> Signup and view all the answers

Imagine a hypothetical scenario where a new strain of HIV emerges that demonstrates complete resistance to all currently available antiretroviral drugs. Which of the following strategies would be the MOST promising avenue for developing effective treatment against this novel strain?

<p>Developing drugs that target host cellular factors essential for HIV replication, therefore minimizing the selective pressure for viral resistance. (A)</p> Signup and view all the answers

A researcher discovers a new protein on the surface of HIV-infected cells that is not present on healthy cells. This protein plays a critical role in the virus's ability to fuse with and enter new target cells, but it is structurally very similar to a human protein involved in blood clotting. Developing a drug that targets this viral protein would be MOST challenging due to the:

<p>Potential for severe off-target effects due to the drug also binding to the similar human protein, disrupting blood clotting. (B)</p> Signup and view all the answers

Flashcards

What is HIV?

A retrovirus causing immunosuppression, leading to opportunistic infections and malignancies.

What is AIDS?

The end-stage of HIV infection, characterized by a severely compromised immune system.

What are CD4+ T cells?

Helper T cells crucial for proper immune function.

What is reverse transcriptase?

An enzyme used by HIV to convert its RNA into DNA within the host cell.

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How is HIV transmitted?

Contact with infected blood, semen, vaginal secretions, or breast milk.

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What are the symptoms of acute HIV infection?

Fever, fatigue, swollen lymph nodes.

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Examples of opportunistic infections.

Pneumocystis jirovecii pneumonia (PCP), candidiasis, and cytomegalovirus (CMV).

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What is Kaposi's sarcoma?

Cancer causing lesions on the skin, often seen in advanced HIV.

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What does an antibody/antigen test for HIV do?

Detects HIV antibodies and antigens in the blood.

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What is viral load?

Measures the amount of HIV RNA in the blood.

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What is the goal of HIV treatment?

Suppresses viral replication and maintains CD4+ T cell counts.

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What is ART?

Multiple drugs from different classes targeting various stages of the HIV life cycle.

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Classes of ART drugs.

NRTIs, NNRTIs, PIs, and integrase inhibitors.

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What does HIV nursing care focus on?

Promoting adherence to ART, managing symptoms, preventing opportunistic infections, and providing emotional support.

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What is PrEP?

Antiretroviral medications taken by HIV-negative individuals to reduce infection risk.

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What is PEP?

ART medications taken after potential HIV exposure.

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Study Notes

Etiology and Pathophysiology

  • HIV targets CD4+ T cells, which are crucial for immune function.
  • The virus binds to CD4+ receptors and enters the cell, using reverse transcriptase to convert its RNA into DNA.
  • Viral DNA integrates into the host cell's DNA, leading to the production of new viral particles.
  • HIV replicates and destroys CD4+ T cells, gradually weakening the immune system.
  • A normal CD4+ T cell count is 800 to 1200 cells/μL, but in HIV infection, it decreases.
  • HIV is transmitted through infected blood, semen, vaginal secretions, or breast milk.
  • Common transmission modes include unprotected sex, sharing needles, and perinatal transmission.
  • HIV is not spread through casual contact.

Clinical Manifestations

  • Acute HIV infection may present with flu-like symptoms.
  • Early chronic infection is often asymptomatic but can last for years.
  • As the disease progresses, opportunistic infections and other complications arise.
  • Common opportunistic infections include Pneumocystis jirovecii pneumonia (PCP), candidiasis, and cytomegalovirus (CMV) infection.
  • Other manifestations include Kaposi's sarcoma and HIV-related encephalopathy.

Diagnostic Studies

  • HIV infection is diagnosed through antibody/antigen tests.
  • A confirmatory test, such as a Western blot or an HIV-1/HIV-2 antibody differentiation assay, is performed if the initial test is positive.
  • CD4+ T cell counts and viral load are used to monitor disease progression and response to treatment.
  • Other tests may screen for opportunistic infections and complications.

Collaborative Care

  • The main goal of HIV treatment is to suppress viral replication, reduce viral load, and maintain CD4+ T cell counts.
  • Antiretroviral therapy (ART) involves multiple drugs to target various stages of the HIV life cycle.
  • Common ART drug classes include NRTIs, NNRTIs, PIs, and integrase inhibitors.
  • ART is highly effective but must be taken consistently to prevent drug resistance.
  • Patients may need prophylactic medications to prevent opportunistic infections and vaccinations.

Nursing Management

  • Nursing care focuses on ART adherence, symptom management, preventing opportunistic infections, and emotional support.
  • Assess the patient's knowledge about HIV, treatment, and prevention strategies.
  • Educate patients about ART adherence and potential side effects.
  • Teach patients how to prevent HIV spread through safe sex and avoiding needle sharing.
  • Monitor for signs and symptoms of opportunistic infections and complications.
  • Provide supportive care for symptoms like fatigue, pain, and nausea.
  • Offer emotional support and counseling.
  • Advocate for patients' rights and access to care.

Prevention

  • Preventing HIV transmission involves avoiding risky behaviors.
  • Pre-exposure prophylaxis (PrEP) involves antiretroviral medications for HIV-negative individuals.
  • Post-exposure prophylaxis (PEP) involves ART medications after potential exposure.
  • Educating individuals about HIV transmission and prevention is crucial.
  • Regular HIV testing is recommended for high-risk individuals.

Psychosocial Considerations

  • Living with HIV can cause stigma, discrimination, and social isolation.
  • Patients may experience anxiety, depression, and other mental health issues.
  • Nurses should provide a supportive environment.
  • Encourage counseling and support from mental health professionals and support groups.
  • Address issues related to disclosure, relationships, and sexuality.

Gerontologic Considerations

  • The number of older adults living with HIV is increasing.
  • Older adults may be diagnosed later, leading to delayed treatment and poorer outcomes.
  • Age-related changes can make older adults more susceptible to opportunistic infections.
  • Older adults may experience more side effects from ART medications.
  • Nursing care should be tailored to the specific needs of older adults with HIV.

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Description

This lesson covers the etiology, pathophysiology, and clinical manifestations of HIV. It explains how HIV targets CD4+ T cells, replicates, and weakens the immune system. It also discusses transmission modes and the progression of the disease.

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