Overview
This article describes a method to quantify infectious murine norovirus (MNV) particles using a plaque assay. The assay leverages MNV's tropism for murine macrophages and can be adapted for various biological or environmental samples.
Key Study Components
Area of Science
- Virology
- Cell culture techniques
- Infectious disease research
Background
- Murine norovirus is the only norovirus that replicates efficiently in cell culture.
- Quantifying infectious particles is crucial for understanding norovirus infections.
- The plaque assay is a standard method for measuring viral infectivity.
- Maintaining healthy cell cultures is essential for successful assays.
Purpose of Study
- To develop a reliable method for quantifying infectious MNV particles.
- To provide a protocol that can be used with various sample types.
- To facilitate research on norovirus transmission and infection dynamics.
Methods Used
- Preparation of tenfold dilutions of virus inoculum.
- Inoculation of murine macrophage monolayers with the virus.
- Overlaying with agarose and incubation to allow plaque formation.
- Staining with neutral red to visualize plaques.
Main Results
- The method successfully quantifies infectious MNV particles.
- Visual demonstration of the assay is critical for new users.
- Optimal conditions for cell viability and plaque observation are outlined.
- Results can inform studies on viral shedding and tissue infection.
Conclusions
- This plaque assay provides a robust method for studying MNV.
- Understanding viral quantification aids in norovirus research.
- Future studies can leverage this method to explore infection mechanisms.
What is murine norovirus?
Murine norovirus (MNV) is a virus that infects mice and is used as a model for studying norovirus infections in humans.
Why is the plaque assay important?
The plaque assay is crucial for quantifying viral infectivity and understanding the dynamics of viral infections.
What are the key steps in the plaque assay?
Key steps include preparing dilutions, inoculating cell monolayers, overlaying with agarose, and staining for plaque visualization.
How can this method be adapted for environmental samples?
The plaque assay can be modified to accommodate environmental samples by using appropriate dilution and inoculation techniques.
What challenges might new users face?
New users may struggle with maintaining cell viability and understanding the plaque formation process.
What temperature is optimal for incubating the cells?
Cells should be incubated at 37 degrees Celsius with 5% carbon dioxide for optimal growth.
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