Individual and social immunisation in insects

Area of Science:

• Insect immunology
• Social immunity
• Evolutionary biology

Background:

• Individual organisms possess immune systems capable of protecting against secondary infections.
• In insect colonies, immune protection extends beyond the individual to the societal level, a phenomenon known as social immunity.

Purpose of the Study:

• To review evidence and mechanisms of individual and social immunisation in insects.
• To differentiate between general immune protection and specific immune memory (priming).
• To examine insect immunisation across individual lifespans, colony dynamics, and across generations.

Main Methods:

• Literature review of recent evidence on insect immunisation.
• Analysis of mechanisms distinguishing general immunity from specific immune memory.
• Examination of immunisation in different temporal contexts (individual, colony, transgenerational).

Main Results:

• Insect immune systems exhibit both individual-specific immune memory and broader social immunity within colonies.
• Immunisation can occur within an individual's lifetime, across a colony's existence, and be passed to offspring (transgenerational immunisation).
• Parallels exist between insect social immunity and disease defence strategies in human societies.

Conclusions:

• Recurrent parasitic pressures have driven the evolution of sophisticated individual and social immune strategies in insects.
• Understanding insect social immunity provides insights into collective defence mechanisms.
• Insect immunisation strategies highlight the adaptive capacity of immune systems in response to ecological challenges.