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Review Question - QID 216583

QID 216583 (Type "216583" in App Search)
A 29-year-old man presents to his primary care provider for a routine follow-up appointment. His past medical history is significant for infection with human immunodeficiency virus (HIV). He is currently on antiretroviral therapy (ART) with bictegravir, emtricitabine, and tenofovir alafenamide. He smokes 1 pack a day of cigarettes but does not drink alcohol or use illicit drugs. The patient continues to have unprotected sexual intercourse with both males and females. His temperature is 98.4°F (36.9°C), blood pressure is 124/83 mmHg, pulse is 63/min, respirations are 12/min, and oxygen saturation is 99% on room air. His lungs are clear to auscultation bilaterally and he has normal S1 and S2 heart sounds without murmurs, rubs, or gallops. His most recent cluster of differentiation 4 (CD4) T lymphocyte count is 150/mm^3 (normal 500-1400/mm^3). Which of the following treatments is the most appropriate for the patient at this time?

Azithromycin and measles, mumps, rubella (MMR) vaccine

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Azithromycin and pneumococcal vaccine

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Trimethoprim-sulfamethoxazole and MMR vaccine

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Trimethoprim-sulfamethoxazole and pneumococcal vaccine

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Trimethoprim-sulfamethoxazole and live-attenuated zoster vaccine

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Select Answer to see Preferred Response

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This patient with HIV and a CD4 cell count of <200 cells/mm^3 requires prophylaxis with trimethoprim-sulfamethoxazole (TMP-SMX) and the pneumococcal vaccine.

All patients with HIV and a CD4 cell count <200 cells/mm^3 require prophylaxis against Pneumocystis pneumonia with TMP-SMX. For those with CD4 cell counts <100 cells/mm^3, prophylaxis against toxoplasmosis using TMP-SMX is also indicated. In addition, all patients with HIV should initially receive the 13-valent pneumococcal vaccine, followed by the 23-valent pneumococcal vaccine (PPSV23) 8 weeks later, at 5 years later, and at the age of 65. It is preferable to give the PPSV23 vaccine when CD4 counts are at least 200 cells/mm^3. Patients with HIV should also receive the coronavirus disease-19 (COVID-19) vaccine, inactivated seasonal influenza vaccine, tetanus toxoid with acellular pertussis (TdaP), human papillomavirus (HPV) vaccination in patients less than 26 years of age, hepatitis A vaccine, hepatitis B vaccine, and meningococcal vaccination.

Crane et al. review the optimal timing of routine vaccinations for HIV-infected persons. They note that the measles, mumps, and rubella (MMR) vaccine and the varicella are both live vaccines. Therefore, they recommend that these vaccines should be given only to susceptible adults with CD4 cell counts >200 cells/mm^3.

Incorrect Answers:
Answer 1: Azithromycin is given as prophylaxis against Mycobacterium avium complex (MAC) for patients with CD4 cell counts <50 cells/mm^3 and thus would not be indicated in this patient. Additionally, the MMR vaccine is a live vaccine and is contraindicated in a patient with a CD4 cell count <200 cells/mm^3. It would be worth investigating if the patient was previously vaccinated or if titers could be obtained to determine if he has evidence of immunity.

Answer 2: Azithromycin is given as prophylaxis against MAC in patients with CD4 cell counts <50 cells/mm^3 and is not indicated for this patient.

Answer 3: TMP-SMX should be given in this patient for prophylaxis against Pneumocystis pneumonia given the CD4 cell count <200 cells/mm^3, but the MMR vaccine is contraindicated in this immunocompromised patient as it is a live vaccine. It would be worth investigating if the patient was previously vaccinated or if titers could be obtained to determine if he has evidence of immunity.

Answer 5: TMP-SMX should be given in this patient for prophylaxis against Pneumocystis pneumonia given the CD4 cell count <200 cells/mm^3. The live-attenuated zoster vaccine is contraindicated in this immunocompromised patient. However, the inactivated zoster vaccine can be given to patients greater than 50 years old regardless of CD4 cell count.

Bullet Summary:
In patients with HIV and a CD4 cell count <200 cells/mm^3, trimethoprim-sulfamethoxazole prophylaxis against Pneumocystis pneumonia and the pneumococcal vaccine are indicated.

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