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Updated: Oct 21, 2025
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A Visual Guide for Studying Behavioral Defenses to Pathogen Attacks in Leaf-Cutting Ants
Published on: October 12, 2018
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Immune challenges increase network centrality in a queenless ant
Giacomo Alciatore1,2, Line V Ugelvig3,4, Erik Frank2,5
1Institute of Integrative Biology, ETHZ Zürich, 8092 Zürich, Switzerland.
Proceedings. Biological Sciences
|September 8, 2021
Summary
Social ants can detect sick nest-mates and increase social contact, a "caring" strategy, rather than avoidance. This response to perceived infection risk was observed using immune challenges and automated tracking in clonal raider ants.
Area of Science:
- Animal behavior
- Immunology
- Social insects
Background:
- Social animals exhibit diverse disease defense strategies, including those that increase or decrease social contact.
- Detecting infectious individuals is crucial for these defenses, but the mechanisms are complex.
- Understanding how social insects perceive and respond to infection risk is key to social immunity.
Purpose of the Study:
- To investigate if ants can detect the immune status of their nest-mates.
- To quantify behavioral responses to perceived infection risk in ants.
- To determine if immune challenges alone can elicit disease-related behaviors.
Main Methods:
- Utilized non-pathogenic immune challenges in clonal raider ant colonies.
- Employed automated tracking to monitor social interactions.
- Analyzed changes in network centrality and physical contacts.
Main Results:
- Immune challenges qualitatively mimicked responses to live pathogens (allogrooming).
- Behavioral responses led to increased network centrality for immune-challenged ants.
- A general increase in physical contacts, suggesting a 'caring' strategy, was observed.
Conclusions:
- Ants can detect the immune status of their social partners.
- The response to perceived infection involves increased social contact, not avoidance.
- Cuticular hydrocarbon profiles do not appear to drive these behavioral changes.
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