Study

Targeted treatment of injured nestmates with antimicrobial compounds in an ant society

Frank, Erik T.; Kesner, Lucie; Liberti, Joanito; Helleu, Quentin; Keller, Laurent

Nature Communications, 2023

Peer-reviewedcontrolled laboratory experimentlaboratory

What they did

Ants injured during termite raids were observed as nestmates treated their wounds with secretions from the metapleural gland. Chemical analysis identified the compounds, and survival was compared between ants that received treatment and those prevented from receiving it.

Studied in: Megaponera analis
Sample size: injured workers monitored for survival across treatment groups

What they found

Wound treatment substantially reduced mortality from infection. The gland secretion contained many compounds with antimicrobial and wound-healing properties, applied specifically to the injury site.

What it means

The authors' reading, and ours. Where they differ, that difference is the point.

How the authors put it

These ants use a targeted antimicrobial treatment on wounded nestmates, reducing infection mortality at the colony level.

How NatureHQ reads it

Reported almost everywhere as ants performing medicine, which imports intention the study does not test. What is demonstrated is precise, chemically specific and genuinely remarkable on its own terms: a secretion with antimicrobial activity applied to a wound, with a measurable survival benefit. Whether any ant is treating anything, in the sense a doctor treats a patient, is not a question this design asks.

Limitations

Survival measured under laboratory conditions with controlled infection exposure.
One species with an unusually injury-prone lifestyle.
The behaviour’s trigger and its development within the colony are not fully characterised.