Galleria mellonella as a novel invertebrate model for studying Ehrlichia ruminantium pathogenesis and host-pathogen interactions.

Galleria mellonella larvae serve as a viable invertebrate model for studying Ehrlichia ruminantium, showing bacterial persistence and host interactions over two weeks.

• Why it matters: Current models face ethical, logistical, and economic challenges, limiting detailed study of host-pathogen dynamics in arthropod vectors and hindering heartwater disease research.
• What they did: Researchers infected G. mellonella larvae with E. ruminantium, tracked bacterial dissemination using fluorescence microscopy, and measured bacterial loads with quantitative PCR, confirming viability and infectivity.
• The result: The model demonstrated bacterial persistence without immune activation, enabling high-throughput screening and advancing understanding of pathogen biology and immune evasion relevant to disease control strategies.