The herring piglets have been analyzed by the Swedish Veterinary Institute.

- We can generally see an increased mortality among wild birds.

During week 28, we sent in more birds for analysis from both Lilla and Stora Karlsö, and based on the answers we received today, it is very likely that these are also infected with bird flu, says county veterinarian Agneta Karlsson Norström, county veterinarian in a press release.

May have consequences

The risk of it being transmitted to humans is considered to be low - but the disease can have major consequences for those who have domestic birds.

- Visitors to Stora and Lilla Karlsö who themselves have tame poultry in their vicinity, their own or with a neighbor, need to wash their shoes with soap and water before leaving Karlsöarna, says Agneta Karlsson Norström.

SVT has previously drawn attention to the dead herring pigs on Gotland:

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Ulf Ahlquist found dead herring guillemots off the Fröjel coast and then contacted supervisor Måns Hjernquist.

Photo: Märta Gross Hulth / SVT