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HIV

Improper Use of PrEP Leads to Acute HIV Infection and Diagnostic Challenges

Strategic Insights

— 1 min read

A case study from the Tianjin Centers for Disease Control and Prevention in China has revealed that improper use of pre-exposure prophylaxis (PrEP) can lead to breakthrough infections and diagnostic challenges. Despite the high efficacy of PrEP in preventing HIV infection among men who have sex with men (MSM), the research highlights the importance of proper use and monitoring of the treatment. The case in question involves a 30-year-old MSM who was prescribed on-demand PrEP with tenofovir disoproxil fumarate/emtricitabine (TDF/FTC) via telemedicine, resulting in a positive pooled HIV-1 nucleic acid testing (NAT) result despite a negative HIV antibody test.

Key Takeaways:

  • The case study demonstrates the importance of proper use and monitoring of PrEP in preventing HIV infection.
  • Improper use of TDF/FTC PrEP can lead to breakthrough infections and diagnostic challenges, highlighting the need for vigilant monitoring and follow-up care.
  • The transient drug resistance mutations that may arise following PrEP failure do not compromise the efficacy of HIV treatment, as per the research.
  • The study emphasizes the importance of regular HIV screenings and diagnostics for individuals taking PrEP, even in the absence of symptoms.
  • The research team cautions against excessive concern regarding the transient drug resistance mutations that may arise following PrEP failure.
  • The case in question highlights the potential for low-level viremia and transient K70KR mutation in individuals with acute HIV infection.

Statistics:

  • 30-year-old MSM was prescribed on-demand PrEP with TDF/FTC via telemedicine.
  • 5 months after initiating PrEP treatment, pooled NAT reported a positive result, while the HIV antibody test remained negative.
  • HIV antibody seroconversion was observed in the subsequent month, with a detectable viral load.
  • The transient K70KR mutation was detected during the diagnostic process.
  • 10-sample pooled HIV-1 nucleic acid testing (NAT) was used to detect the positive result.
  • The study highlights the importance of regular HIV screenings and diagnostics for individuals taking PrEP.

Sources:

  • Virology Journal, 2025;22(1):322.
  • Improper use of TDF/FTC PrEP leading to acute HIV infection with low-level viremia and transient K70KR mutation: diagnostic challenges and drug resistance dynamics.
  • Bmc, Campus, 4 Crinan St, London N1 9XW, England.
  • www.biomedcentral.com; Virology Journal - www.virologyj.com.

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