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Plaque assay for black beetle virus.

B H Selling, R R Rueckert

Journal of Virology

|July 1, 1984

Summary

Researchers developed a plaque assay for Black beetle virus using Drosophila cells. This method aids in isolating new virus strains and confirms its split genome structure.

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Area of Science:

Virology
Cell Biology
Genetics

Background:

Black beetle virus (BBV) possesses a split genome, with its two RNA segments packaged in separate particles.
Previous methods for studying BBV strains were less efficient, hindering research into viral evolution and reassortment.

Purpose of the Study:

To establish a reliable plaque assay for Black beetle virus (BBV) in cultured Drosophila cells.
To facilitate the isolation and characterization of reassortant and variant BBV strains.
To provide further evidence for the genomic structure of BBV.

Main Methods:

Culturing Drosophila melanogaster cells to form monolayers.
Inoculating cell monolayers with a rapidly growing strain of Black beetle virus.
Optimizing cell density for plaque formation and enumeration.
Analyzing the dose-response curve of plaque formation.

Main Results:

A reliable plaque assay for Black beetle virus was successfully developed.
Optimal cell density was identified as critical for consistent plaque formation.
The linear dose-response curve supports the hypothesis that both RNA segments of BBV's split genome are found within the same viral particle.
The assay significantly simplifies the isolation of reassortant and variant BBV strains.

Conclusions:

The developed plaque assay is a valuable tool for Black beetle virus research.
The findings reinforce the understanding of BBV's unique split genome packaging.
This method will accelerate studies on viral genetics and the emergence of new virus strains.

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