Outbreak of American Foulbrood Detected Across Sweden

A significant outbreak of American foulbrood, known as bipest, has been identified in several locations across Sweden, particularly on Gotland, as of late July 2025. The disease, which is highly infectious and causes severe larval mortality due to a bacterial infection, poses a serious threat to bee populations.

The County Administrative Board of Gotland has responded to the outbreak by establishing a restriction zone and a monitoring zone to curb the disease's spread. Affected colonies, including the one in Hangvar parish, will be culled and destroyed to prevent further infection. Furthermore, all registered beehives within a three-kilometer radius of the infected site are being inspected by beekeeping inspectors. During this period, the movement of live bees, honeycombs, and beekeeping equipment is strictly prohibited without special permission.

Symptoms of American foulbrood include irregularly covered cells and light brown, sticky mass within the cells that indicates the presence of larval remains. Earlier this month, additional cases were reported in the Gävle area, resulting in the establishment of four specific zones for monitoring, and another case in Lidhult, Småland, where the infection is thought to have spread from an unregistered beekeeper.

To enhance control and ensure safety, the County Administrative Board is urging local beekeepers on Gotland to register their hives to facilitate communication and inspections, highlighting the need for collaborative efforts in addressing this crisis.