Development of a rotavirus plaque assay using Sephadex G-75

Area of Science:

• Virology
• Cell Biology

Background:

• Rotavirus infections pose a significant public health challenge.
• Accurate and efficient methods for rotavirus strain characterization are crucial for research and diagnostics.

Purpose of the Study:

• To develop a rapid, reproducible, and easily performed plaque assay for rotavirus.
• To optimize plaque formation using alternative reagents for improved visualization.

Main Methods:

• MA-104 cells were utilized for viral propagation and plaque induction.
• Sephadex G-75 was employed as a substitute for traditional agar in the cell overlay.
• Crystalline trypsin was added to the overlay to facilitate plaque development.

Main Results:

• The assay demonstrated rapidity and reproducibility across various rotavirus strains.
• Sephadex G-75 and trypsin effectively induced large, discrete, and easily readable plaques.
• The method proved successful for both human and non-human rotavirus strains.

Conclusions:

• This modified plaque assay provides an efficient and reliable tool for rotavirus research.
• The use of Sephadex G-75 offers a viable alternative to agar for rotavirus plaque assays.
• The assay's ease of performance and clear plaque visualization enhance its utility in virological studies.