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Updated: May 10, 2026
The Insect Galleria mellonella as a Powerful Infection Model to Investigate Bacterial Pathogenesis
Published on: December 11, 2012
Galleria mellonella as an Invertebrate Model for Studying Fungal Infections
Gabriel Davi Marena1, Luciana Thomaz1, Joshua Daniel Nosanchuk2
1Institute of Biomedical Science, Department of Microbiology, University of São Paulo (ICB II-USP), São Paulo 05508-900, Brazil.
Abstract:
The incidence of fungal infections continues to increase and one of the factors responsible for these high rates is the emergence of multi-resistant species, hospitalizations, inappropriate or prolonged use of medications, and pandemics, such as the ongoing HIV/AIDS pandemic. The recent pandemic caused by the severe acute respiratory syndrome virus (SARS-CoV-2) has led to a significant increase in fungal infections, especially systemic mycoses caused by opportunistic fungi. There is a growing and urgent need to better understand how these microorganisms cause infection and develop resistance as well as to develop new therapeutic strategies to combat the diverse diseases caused by fungi. Non-mammalian hosts are increasingly used as alternative models to study microbial infections. Due to their low cost, simplicity of care, conserved innate immunity and reduced ethical issues, the greater wax moth Galleria mellonella is an excellent model host for studying fungal infections and it is currently widely used to study fungal pathogenesis and develop innovative strategies to mitigate the mycoses studied. G. mellonella can grow at 37 °C, which is similar to the mammalian temperature, and the anatomy of the larvae allows researchers to easily deliver pathogens, biological products, compounds and drugs. The aim of this review is to describe how G. mellonella is being used as a model system to study fungal infections as well as the importance of this model in evaluating the antifungal profile of potential drug candidates or new therapies against fungi.
Insights
The greater wax moth, Galleria mellonella, is an effective, low-cost model for studying fungal infections and evaluating new antifungal therapies. Its use helps combat rising multi-resistant fungal species and emerging mycoses.
Area of Science:
- Mycology
- Infectious Diseases
- Invertebrate Models
Background:
- Rising incidence of fungal infections driven by multi-resistant species, pandemics (e.g., HIV/AIDS, SARS-CoV-2), and medical interventions.
- Increased prevalence of systemic mycoses, particularly those caused by opportunistic fungi, necessitates urgent research.
- Need for better understanding of fungal pathogenesis, resistance mechanisms, and novel therapeutic strategies.
Purpose of the Study:
- To review the utility of *Galleria mellonella* as a model system for studying fungal infections.
- To highlight the importance of *G. mellonella* in evaluating antifungal drug candidates and novel therapies.
- To underscore the value of non-mammalian models in mycology research.
Main Methods:
- Utilizing *Galleria mellonella* as a host model for fungal infection studies.
- Administering pathogens, biological products, compounds, and drugs to *G. mellonella* larvae.
- Assessing fungal pathogenesis and treatment efficacy within the *G. mellonella* model.
Main Results:
- *Galleria mellonella* serves as a cost-effective, ethically sound alternative model for studying microbial infections.
- The model's conserved innate immunity and ability to grow at mammalian temperatures (37 °C) facilitate relevant research.
- *G. mellonella* larvae's anatomy allows for straightforward delivery of experimental agents, aiding pathogenesis and drug screening.
Conclusions:
- *Galleria mellonella* is a valuable and widely adopted model for investigating fungal infections and pathogenesis.
- This invertebrate model is crucial for the preclinical evaluation of potential antifungal agents and therapies.
- The use of *G. mellonella* contributes to developing innovative strategies against challenging fungal diseases.
