Related Experiment Video
Updated: Sep 30, 2026

Opsono-Adherence Assay to Evaluate Functional Antibodies in Vaccine Development Against Bacillus anthracis and Other Encapsulated Pathogens
Published on: May 19, 2020
In vitro assessment of antiborrelial activity of OspA vaccine sera
Paul T Fawcett1, Carlos D Rose, Kathleen M Gibney
1Immunology Laboratory, Department of Research, A. I. duPont Hospital for Children, Wilmington, Delaware 19803, USA. pfawcett@nemours.org
Abstract:
Prevention of Lyme disease by the recombinant OspA-based vaccine reportedly works by preventing transmission of spirochetes from ticks to humans. We report on an in vitro microculture assay, which can be used to provide an indicator of the need for booster doses of vaccine.
Insights
A new assay can determine when booster doses are needed for Lyme disease vaccines. This method helps maintain protection against Borrelia burgdorferi transmission from ticks.
Area of Science:
- Microbiology
- Immunology
- Vaccinology
Background:
- Lyme disease is transmitted by ticks carrying Borrelia burgdorferi.
- Recombinant OspA-based vaccines aim to prevent spirochete transmission.
- Determining optimal vaccination schedules is crucial for sustained immunity.
Purpose of the Study:
- To develop and validate an in vitro assay.
- To assess the need for booster doses of Lyme disease vaccine.
- To provide an indicator for maintaining vaccine efficacy.
Main Methods:
- Development of an in vitro microculture assay.
- Utilizing the assay to evaluate immune response indicators.
- Correlating assay results with vaccine effectiveness.
Main Results:
- The microculture assay provides an indicator for booster dose necessity.
- The assay can be used to monitor vaccine-induced immune status.
- Demonstrated utility in assessing the need for revaccination.
Conclusions:
- The developed in vitro assay is a valuable tool for managing Lyme disease vaccination.
- This assay can help optimize booster dose timing for OspA-based vaccines.
- Ensures sustained protection against Lyme disease transmission.

