Immunohistochemical Detection of SARS-CoV-2 Antigens by Single and Multiple Immunohistochemistry

Silvia Lonardi1, Mattia Bugatti2, Arianna Valzelli1

  • 1Section of Pathology, Department of Molecular and Translational Medicine, University of Brescia, Spedali Civili di Brescia, Brescia, Italy.

Insights

Immunohistochemistry (IHC) detects SARS-CoV-2 in tissues. Multi-staining techniques enhance precision for identifying infected cells and analyzing tissue structures, improving diagnostic efficiency.

Area of Science:

  • Pathology
  • Immunology
  • Virology

Background:

  • Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection requires accurate detection in tissue samples.
  • Immunohistochemistry (IHC) is a valuable tool for visualizing specific antigens within cells and tissues.

Purpose of the Study:

  • To highlight the utility of immunohistochemistry (IHC) for detecting SARS-CoV-2 in tissue sections.
  • To demonstrate the advantages of double or triple immunostaining and immunoenzymatic multi-staining for detailed cellular and tissue analysis.

Main Methods:

  • Utilizing bright field microscopy with immunohistochemistry (IHC).
  • Employing double or triple immunostains to identify infected cells and their relationships within tissue structures.
  • Implementing immunoenzymatic multi-staining for simultaneous identification, localization, and enumeration of cellular epitopes.

Main Results:

  • Immunohistochemistry (IHC) effectively localizes SARS-CoV-2 antigens in tissue sections.
  • Multi-staining techniques accurately identify infected cells and their spatial relationships.
  • Immunoenzymatic multi-staining allows for simultaneous analysis of multiple cellular targets.

Conclusions:

  • Immunohistochemistry (IHC), particularly multi-staining methods, offers a precise and efficient approach for diagnosing SARS-CoV-2 infections in tissues.
  • These techniques improve analytical precision and reduce quantification time, maximizing information from paraffin-embedded tissues.