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Case Reports
. 2021 Nov:71:103027.
doi: 10.1016/j.amsu.2021.103027. Epub 2021 Nov 6.

False-positive HIV in a patient with SARS-CoV-2 infection; a case report

Rawezh Q Salih  1   2 , Gasha A Salih  3   4 , Berwn A Abdulla  1   2 , Abdulla D Ahmed  1 , Hawbash R Mohammed  1   2   3 , Fahmi H Kakamad  1   2   5 , Abdulwahid M Salih  1   5
Affiliations
Case Reports

False-positive HIV in a patient with SARS-CoV-2 infection; a case report

Rawezh Q Salih et al. Ann Med Surg (Lond). 2021 Nov.

Abstract

Introduction: A small portion of Corona Virus disease-2019 (COVID-19) cases associated with co-infections, however occasionally they turn out to be false positive due to possible cross-reactivities. The current report aims to present a rare case of false-positive human immunodeficiency virus (HIV) in a COVID-19 patient.

Case report: A 32-year-old female complaining from thyroid problems referred for thyroid operation. She had mild symptoms of COVID-19. Her preoperative laboratory findings were normal, except for HIV screening test which was repetitively positive. RNA PCR was performed to confirm the diagnosis of HIV, it revealed a negative result. The patient underwent thyroidectomy as planned and was given the required supportive treatment to recover from COVID-19. Two-month follow up revealed that she was negative for COVID-19 on PCR testing, and HIV immunoassay test was no longer positive.

Discussion: Due to structural similarities between the spike protein chains of SARS-CoV-2 and some other viruses such as dengue, Zika, and other closely related coronaviruses (SARS-CoV, MERS-CoV), the protein can potentially interfere with the immunoassay tests. Although HIV immunoassay tests have high sensitivity and specificity, false-positive results have been reported, such as in the case of Epstein Barr virus, Influenza vaccination, and the Australian COVID-19 vaccination.

Conclusion: Similarity between HIV and SARS-CoV-2 spike proteins can lead to antibody cross-reactivities, yielding false-positive results on immunoassay screening tests.

Keywords: COVID-19; Cross-reactivity; False-positive; HIV; SARS-CoV-2.

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Conflict of interest statement

None to be declared.

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