RNA sequencing of ant brains and fat bodies showed a tissue-specific shift: the fat body adopted a partly queen-like profile tied to metabolism, immunity, stress resistance and aging, while brain neuropeptides and receptors linked to behavior were downregulated.
20 years is the lifespan queens of this species can reach, versus 1 to 2 years for normal workers; infected workers had previously shown survival rates approaching queens, and the new gene-expression data offers a molecular explanation.
The team found no evidence that the tapeworm chemically mimics ant signaling molecules, instead concluding it manipulates the host indirectly by altering the ant's own regulatory networks.
Woodpeckers are the parasite's definitive hosts, so longer-lived, less active ants could improve transmission and make this ant-tapeworm system a model for studying parasite control of aging and behavior.
This parasite makes ants live like queens. Could its longevity secret be harnessed for humans?
A tapeworm can control an ant's brain. Are parasites secretly influencing our own behavior and health?
The Tapeworm That Makes Ants Live Like Queens: Unraveling the Molecular and Evolutionary Secrets of Parasitic Longevity
Overview
A groundbreaking discovery has revealed that the tapeworm Anomotaenia brevis can dramatically extend the lifespan of its ant host, Temnothorax nylanderi, challenging the traditional view that parasites are always harmful. Infected ants live as long as the colony’s queen and show unique behavioral and physical changes, such as staying safely inside the nest and being cared for by uninfected workers. This surprising benefit for the individual ant forces scientists to rethink parasite-host relationships, showing that some parasites can provide unexpected advantages while also impacting the entire colony’s well-being.