Cryptococcus neoformans Virulence Assay Using a Galleria mellonella Larvae Model System

Area of Science:

• Mycology
• Infectious Diseases
• Invertebrate Models

Background:

• Cryptococcus neoformans is a significant human pathogen causing life-threatening infections like meningitis.
• High mortality rates and limited therapeutic options necessitate improved research into C. neoformans virulence factors.
• The Greater Wax Moth (Galleria mellonella) is an emerging invertebrate model for studying fungal pathogenesis.

Purpose of the Study:

• To establish and detail a protocol for using Galleria mellonella larvae to assess Cryptococcus neoformans virulence.
• To provide troubleshooting guidance for the infection procedure and larvae viability assessment.
• To demonstrate the adaptability of the G. mellonella model for various experimental conditions.

Main Methods:

• Infection of G. mellonella larvae with C. neoformans.
• Monitoring and evaluation of larvae viability post-infection.
• Detailed description of the experimental protocol and potential modifications.
• Troubleshooting common issues encountered during the infection process.

Main Results:

• A robust protocol for C. neoformans virulence assessment in G. mellonella was developed.
• The protocol includes methods for evaluating larvae survival and troubleshooting infection parameters.
• The model demonstrated flexibility for studying different fungal inocula, species, temperatures, and drug effects.

Conclusions:

• Galleria mellonella larvae provide a valuable and adaptable model for studying Cryptococcus neoformans virulence.
• This protocol facilitates research into fungal pathogenesis and the efficacy of antifungal agents.
• The G. mellonella model offers a cost-effective and accessible alternative for cryptococcal infection research.