Project snapshot: Transmission of deformed wing virus (DWV) via imported honey

This project examined whether imported honey could introduce deformed wing virus (DWV) into Australia.

This risk has increased since the establishment of Varroa destructor, which drives severe DWV impacts overseas. Although Australian bees remain free of DWV, the virus appears often in honey from other countries. Researchers aimed to clarify whether imported honey contains infectious virus levels and whether it could realistically spread to local bees.

The team tested 15 imported honey products, including raw and processed types, from supermarkets and online retailers. They detected DWV in many raw products, but the levels remained low. They found no DWV in processed honey, showing that filtration and heat treatment reduce virus risk effectively.

Laboratory experiments exposed bee pupae and adult bees to contaminated honey. These tests produced rare and inconsistent signs of infection, with very low virus levels when detected.

The findings indicate that imported honey presents a low risk for DWV transmission under normal conditions. However, the risk is not zero. A targeted biosecurity approach that focuses on higher-risk raw honey, combined with ongoing surveillance, will help protect Australia’s beekeeping industry.

Read the full report here.