How can bees detect viruses in food?

Honey bees may sense viruses—but their behavior suggests a trap

Researchers reported that honey bees can detect viruses, including deformed wing virus (DWV), in their food sources. The findings add to growing evidence that insects can evolve sensory systems to recognize pathogens or pathogen-associated cues.

In controlled experiments and additional field tests, bees showed the ability to identify virus-laced food. But intriguingly, when the team tested preferences in settings meant to reflect more natural conditions, bees didn’t simply avoid infected sources. Instead, they preferred food laced with virus, effectively “flying right into the trap.”

That combination—detection plus attraction—matters because it suggests the ecological impact of viruses may be mediated not only by how viruses replicate, but by how insects interact with them.

If bees are attracted to virus-contaminated resources, that could:

• Increase contact rates between bees and infectious material.
• Accelerate spread within and between colonies.
• Potentially complicate assumptions that animal pathogen detection automatically leads to avoidance.

The study also raises practical questions for beekeeping and disease control. DWV is known to contribute to honey bee health problems, and honey bees’ foraging behavior is one route by which pathogens can move through environments.

More broadly, the results highlight a nuanced view of host-pathogen interactions: sensory detection doesn’t necessarily mean an evolved behavioral strategy to reduce exposure; it can instead be linked to other cues (such as how viruses affect the chemistry of food) that the insects interpret as beneficial.

Overall, the work provides both a mechanism and an unexpected behavior pattern, suggesting that honey bees’ interactions with viral contamination could be an underappreciated factor in infection dynamics.