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Updated: Jun 7, 2026
Oral Bacterial Infection and Shedding in Drosophila melanogaster
Published on: May 31, 2018
Porphyromonas gingivalis virulence in a Drosophila melanogaster model
Christina O Igboin1, Melvin L Moeschberger, Ann L Griffen
1Section of Oral Biology, College of Dentistry, The Ohio State University, 3185 Postle Hall, 305 W. Twelfth Avenue, Columbus, OH 43210, USA.
Abstract:
Porphyromonas gingivalis has been implicated in the etiology of adult periodontitis. In this study, we examined the viability of Drosophila melanogaster as a new model for examining P. gingivalis-host interactions. P. gingivalis (W83) infection of Drosophila resulted in a systemic infection that killed in a dose-dependent manner. Differences in the virulence of several clinically prevalent P. gingivalis strains were observed in the Drosophila killing model, and the results correlated well with studies in mammalian infection models and human epidemiologic studies. P. gingivalis pathobiology in Drosophila did not result from uncontrolled growth of the bacterium in the Drosophila hemolymph (blood) or overt damage to Drosophila tissues. P. gingivalis killing of Drosophila was multifactorial, involving several bacterial factors that are also involved in virulence in mammals. The results from this study suggest that many aspects of P. gingivalis pathogenesis in mammals are conserved in Drosophila, and thus the Drosophila killing model should be useful for characterizing P. gingivalis-host interactions and, potentially, polymicrobe-host interactions.
Insights
The fruit fly Drosophila melanogaster serves as a viable model for studying Porphyromonas gingivalis infections. This model effectively replicates P. gingivalis pathogenesis observed in mammals, aiding research into periodontitis.
Area of Science:
- Microbiology
- Infectious Diseases
- Model Organism Research
Background:
- Porphyromonas gingivalis is a key bacterium linked to adult periodontitis.
- Understanding P. gingivalis-host interactions is crucial for developing effective treatments.
Purpose of the Study:
- To evaluate Drosophila melanogaster as a novel model system for studying P. gingivalis pathogenesis.
- To investigate the conserved mechanisms of P. gingivalis virulence in a non-mammalian host.
Main Methods:
- Infection of Drosophila melanogaster with P. gingivalis strain W83.
- Dose-dependent mortality assays.
- Comparison of virulence across different P. gingivalis strains.
- Analysis of bacterial growth and host tissue damage.
Main Results:
- Drosophila infection with P. gingivalis led to dose-dependent mortality.
- Virulence differences among P. gingivalis strains in Drosophila correlated with mammalian and human studies.
- Bacterial pathogenesis did not stem from uncontrolled hemolymph growth or overt tissue damage.
- P. gingivalis-induced mortality involved multifactorial bacterial factors conserved in mammalian virulence.
Conclusions:
- Drosophila melanogaster is a suitable model for studying P. gingivalis pathogenesis.
- The Drosophila model can elucidate conserved mechanisms of P. gingivalis virulence relevant to mammals.
- This model holds potential for characterizing complex polymicrobial-host interactions.
