Methods for using Galleria mellonella as a model host to study fungal pathogenesis

Area of Science:

• Mycology
• Infectious Diseases
• Insect Pathology

Background:

• The greater wax moth, Galleria mellonella, is a practical insect model for studying fungal pathogenesis due to ease of handling and inoculation.
• Investigating fungal infections in vivo is crucial for understanding disease mechanisms and developing treatments.

Purpose of the Study:

• To present standardized methods for studying fungal virulence, filamentation, and interactions with insect hemocytes using the Galleria mellonella model.
• To illustrate the utility of this model by comparing the distinct infection characteristics of Candida albicans and Cryptococcus neoformans.

Main Methods:

• Utilizing Galleria mellonella larvae as a host model for fungal infection.
• Inoculating larvae with Candida albicans and Cryptococcus neoformans to observe infection progression.
• Analyzing fungal filamentation and interactions with insect hemocytes within the host.

Main Results:

• Demonstrated distinct infection patterns for Candida albicans and Cryptococcus neoformans in Galleria mellonella.
• Successfully visualized fungal cell association with insect hemocytes.
• Established protocols for assessing fungal virulence and morphological changes in vivo.

Conclusions:

• The Galleria mellonella model provides a robust platform for studying fungal pathogenesis, virulence, and host-pathogen interactions.
• The presented methods are adaptable for investigating a wide range of fungal pathogens.
• This model facilitates comparative studies of different fungal species' infection dynamics.