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Efficient Oral Priming of Tenebrio molitor Larvae Using Heat-Inactivated Microorganisms
Sergio González-Acosta1,2, Victoria Baca-González1, Patricia Asensio-Calavia1,2
1Biotechnology of Macromolecules Research Group, Instituto de Productos Naturales y Agrobiología, (IPNA-CSIC), 38206 San Cristóbal de la Laguna, Spain.
Vaccines
|August 26, 2022
Summary
Oral administration of inactivated microbes primes mealworm immunity, enhancing survival against pathogens. This novel approach boosts antimicrobial activity in insect hemolymph, offering a less stressful alternative for studying insect immunity.
Area of Science:
- Insect immunology
- Antimicrobial peptides (AMPs)
- Invertebrate immune responses
Background:
- Microbial resistance is a growing global health concern.
- Insect antimicrobial peptides (AMPs) show promise in combating resistance.
- Invertebrates possess diverse immune systems suitable for discovering new antimicrobial agents.
Purpose of the Study:
- To investigate oral administration as a novel priming method for Tenebrio molitor (mealworm) immunity.
- To assess the efficacy of oral priming in enhancing T. molitor survival and antimicrobial activity.
- To compare oral priming with conventional injection methods.
Main Methods:
- Oral administration of inactivated microorganisms to T. molitor larvae.
- Exposure of primed larvae to various pathogens.
- Measurement of survival rates and antimicrobial activity in larval hemolymph.
Main Results:
- Oral priming significantly increased T. molitor larval survival post-pathogen exposure.
- Primed larvae exhibited enhanced antimicrobial activity in their hemolymph.
- Hemolymph from larvae primed with Escherichia coli showed activity against Staphylococcus aureus and other Gram-negative bacteria.
Conclusions:
- Oral administration of inactivated microbes is an effective and less stressful method for priming T. molitor immunity.
- This technique induces robust antimicrobial activity, highlighting its potential for combating microbial resistance.
- This study presents the first report of oral administration of inactivated microorganisms for mealworm priming.
