Linnugripp räsib ka kormoranikolooniaid

Linnugripp räsib ka kormoranikolooniaid

EN

Avian flu also affects cormorant colonies

Linnugripp levib kiiresti kodulindude seas ja muutub surmavaks. Haigus tapab ka looduses elavaid linde, nagu kormorane.

Linnugripp on looduses elavate lindude jaoks tavaliselt kerge haigus. Metsikud linnud on immuunsed või põevad haigust kergelt. Kuid el on kehvem, mistõttu viirus võib neil kiiresti muutuda tugevamaks ja ohtlikumaks.
Viirus levib kiiresti il. Lisaks soodustab haiguste levikut ka üleilmne . Linnugripi viirus H5 levis esmakordselt Hiinas 1996. aastal ja on hiljem levinud üle maailma.
Viirus on põhjustanud de massilist suremist. Näiteks aastatel 2021-2022 hukkus Lõuna-Aafrikas 15 900 kuldkurk- . Euroopas on viirus esinenud korduvalt, viimati 2021. ja 2022. aastal. Läänemere piirkonnas hukkus aastatel 2021 ja 2022 vähemalt 1700 .
Viirus nakatab ka teisi linde, nagu hõbekajakaid ja merikotkaid. Näiteks Saksamaal saavutas ühes hõbekajakoloonias 424 pesast lennuvõime vaid 20 poega. Viiruse levik on tõenäolisem kolooniates, kus on tihedamalt koos.
Pärast 2021. ja 2022. aasta t on taas kasvanud. See võib tähendada, et lindudel on tekkinud , kuid selle kinnitamiseks on vaja rohkem uuringuid.

Avian flu is spreading rapidly among domestic birds and becomes deadly. The disease also kills wild birds, such as cormorants.

Avian flu is usually a mild disease for wild birds. Wild birds are immune or suffer from the disease mildly. However, domestic birds have weaker immunity, which is why the virus can quickly become stronger and more dangerous for them.
The virus spreads rapidly during the migration period of birds. Additionally, the global bird trade also facilitates the spread of diseases. The H5 avian flu virus first emerged in China in 1996 and has since spread worldwide.
The virus has caused mass mortality among cormorants. For example, in 2021-2022, 15,900 Cape cormorants died in South Africa. In Europe, the virus has appeared repeatedly, most recently in 2021 and 2022. In the Baltic Sea region, at least 1,700 cormorants died in 2021 and 2022.
The virus also infects other birds, such as black-headed gulls and white-tailed eagles. For example, in Germany, in one black-headed gull colony, only 20 chicks out of 424 nests achieved the ability to fly. The spread of the virus is more likely in colonies where nests are closer together.
After the avian flu waves of 2021 and 2022, the colonies have grown again. This may indicate that birds have developed immunity, but more research is needed to confirm this.