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Updated: Jul 10, 2025
Establishment of Viral Infection and Analysis of Host-Virus Interaction in Drosophila Melanogaster
Published on: March 14, 2019
Procedures for the Detection of Wolbachia-Conferred Antiviral Protection in Drosophila melanogaster
Ewa Chrostek1,2
1Institute of Environmental Sciences, Faculty of Biology, Jagiellonian University, Krakow, Poland. ewa.chrostek@uj.edu.pl.
Abstract:
Spread of Wolbachia infections in host populations may be enhanced by Wolbachia-conferred protection from viral pathogens. Wolbachia-infected Drosophila melanogaster survive the pathogenic effects of positive-sense single-stranded RNA virus infections at a higher rate than the flies without Wolbachia. The protection can occur with or without detectable reduction in virus titer. For the comparisons to be meaningful, Wolbachia-harboring and Wolbachia-free insects need to be genetically matched, and original populations of gut microbiota need to be restored after the removal of Wolbachia using antibiotics. Here, I describe the procedures needed to detect Wolbachia-conferred antiviral protection against Drosophila C virus measured as the difference in survival and viral titer between flies with and without Wolbachia.
Insights
Wolbachia bacteria can protect fruit flies (Drosophila melanogaster) from harmful viruses. This study outlines methods to measure this Wolbachia-conferred antiviral protection, crucial for understanding infection spread.
Area of Science:
- Microbiology
- Virology
- Entomology
Background:
- Wolbachia infections can influence host populations.
- Wolbachia may confer protection against viral pathogens in insects.
- Drosophila melanogaster is a model organism for studying insect-pathogen interactions.
Purpose of the Study:
- To describe procedures for detecting Wolbachia-conferred antiviral protection in Drosophila melanogaster.
- To measure the impact of Wolbachia on survival rates during viral infections.
- To assess the relationship between Wolbachia presence, viral titer, and host survival.
Main Methods:
- Utilizing genetically matched Drosophila melanogaster (fruit flies) with and without Wolbachia.
- Restoring native gut microbiota after antibiotic treatment to remove Wolbachia.
- Measuring survival rates and viral titers (Drosophila C virus) in infected and uninfected flies.
Main Results:
- Wolbachia-infected flies exhibit higher survival rates against pathogenic RNA viruses compared to Wolbachia-free flies.
- Antiviral protection can be observed independently of significant reductions in viral titer.
- The study details the methodology for quantifying this protective effect.
Conclusions:
- Wolbachia can provide significant protection against viral infections in Drosophila melanogaster.
- The presence of Wolbachia can enhance host survival, potentially influencing pathogen transmission dynamics.
- Standardized procedures are essential for accurately assessing Wolbachia-mediated antiviral defense.
