Development of an Immunochromatography Assay to Detect Marburg Virus and Ravn Virus

Area of Science:

• Virology
• Immunology
• Diagnostic Development

Background:

• Recent Marburg virus disease (MVD) outbreaks in previously unaffected regions suggest increased spillover risk from natural hosts.
• The causative agents, Marburg virus (MARV) and Ravn virus (RAVV), pose significant public health threats.
• Effective control of MVD outbreaks necessitates the development of rapid and reliable diagnostic tools.

Purpose of the Study:

• To develop and evaluate an immunochromatography (IC) assay for the rapid diagnosis of Marburg virus disease (MVD).
• To assess the sensitivity and specificity of the developed IC assay for detecting MARV and RAVV.

Main Methods:

• Development of an immunochromatography (IC) assay utilizing monoclonal antibodies targeting the MARV/RAVV nucleoprotein.
• Testing the IC assay's ability to detect MARV and RAVV in infected culture supernatants.
• Validation of the IC assay using serum samples from experimentally infected nonhuman primates.

Main Results:

• The developed IC assay demonstrated the capability to detect approximately 10^2-4 TCID50/test of MARV and RAVV in culture supernatants.
• MARV and RAVV antigens were successfully detected in serum samples from nonhuman primates experimentally infected with the viruses.
• The assay showed promising sensitivity for detecting viral antigens.

Conclusions:

• The developed immunochromatography assay is a valuable tool for the rapid point-of-care diagnosis of Marburg virus disease (MVD).
• This rapid diagnostic capability can aid in timely clinical management and outbreak containment efforts.
• Further validation in clinical settings is warranted to confirm its utility in real-world MVD surveillance.