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Zorluk: ZorInfection Control and Hospital-Acquired Conditions

A 26-year-old medical intern sustains a deep percutaneous needlestick injury with a hollow-bore needle immediately after drawing blood from a patient. The source patient's laboratory evaluation reveals a positive hepatitis B surface antigen (HBsAg), positive hepatitis B e antigen (HBeAg), positive anti-HCV antibodies, and a positive HIV-1/2 antigen/antibody combination assay. The source patient's HIV viral load is reported as undetectable on their current antiretroviral regimen. The intern completed the standard 3-dose hepatitis B vaccination series 2 years ago, and an anti-HBs titer drawn one month after the final dose was 45 mIU/mL45 \text{ mIU/mL} (normal: >10 mIU/mL>10 \text{ mIU/mL}). Which of the following is the most appropriate post-exposure management for this intern?

  1. Initiate a 3-drug HIV post-exposure prophylaxis regimen and perform baseline HCV testing; no hepatitis B prophylaxis is indicatedCevap
  2. B
    Initiate a 3-drug HIV post-exposure prophylaxis regimen, administer hepatitis B immune globulin, and perform baseline HCV testing
  3. C
    Initiate a 2-drug HIV post-exposure prophylaxis regimen, administer a hepatitis B vaccine booster, and prescribe empiric direct-acting antivirals for HCV
  4. D
    Withhold HIV post-exposure prophylaxis due to the source's undetectable viral load, but administer hepatitis B immune globulin and perform baseline HCV testing
  5. E
    Delay HIV post-exposure prophylaxis until the source patient's genotypic resistance panel is resulted, and perform baseline HCV testing; no hepatitis B prophylaxis is indicated

Cevap

Initiate a 3-drug HIV post-exposure prophylaxis regimen and perform baseline HCV testing; no hepatitis B prophylaxis is indicated
The most appropriate management for this intern involves addressing HIV, HBV, and HCV exposures simultaneously. For HIV, a 3-drug post-exposure prophylaxis (PEP) regimen must be initiated immediately; an undetectable viral load in the source patient does not eliminate transmission risk from a deep percutaneous hollow-bore needlestick. For HBV, the intern is a documented responder (anti-HBs >10 mIU/mL> 10 \text{ mIU/mL}), meaning they have lifelong immunity and require no further HBV intervention (no HBIG and no booster) despite the source's positive HBsAg and HBeAg. For HCV, no pharmacologic PEP is recommended; the correct action is baseline testing followed by serial monitoring to treat acute infection if it occurs.

Adım Adım Çözüm

1
Evaluate the need for Hepatitis B (HBV) post-exposure prophylaxis.
No HBV prophylaxis is indicated.
The intern is a documented responder to the HBV vaccine series (anti-HBs ≥10 mIU/mL\geq 10 \text{ mIU/mL}). According to CDC guidelines, documented responders require no post-exposure prophylaxis (neither HBIG nor a vaccine booster) regardless of the source patient's HBsAg status.
2
Evaluate the need for Hepatitis C (HCV) post-exposure prophylaxis.
Perform baseline and follow-up HCV testing without empiric treatment.
There is no recommended post-exposure prophylaxis (no direct-acting antivirals or immunoglobulins) for HCV. The standard of care is baseline testing for HCV antibodies/RNA, with follow-up testing to detect and treat any acute transmission.
3
Evaluate the need for HIV post-exposure prophylaxis (PEP).
Initiate a 3-drug HIV PEP regimen immediately.
The source is HIV positive. Although the viral load is undetectable, the 'Undetectable = Untransmittable' (U=U) paradigm applies only to sexual transmission, not to percutaneous blood exposures. Therefore, a standard 3-drug PEP regimen (e.g., tenofovir, emtricitabine, and a third drug like raltegravir or dolutegravir) must be started as soon as possible, ideally within 2 hours, and not delayed for resistance testing.

Anahtar Kavram

Occupational bloodborne pathogen post-exposure prophylaxis (PEP) guidelines
Tahmini Süre:1m 30s
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Infection Control and Hospital-Acquired Conditions

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