A survey by Kagoshima University found that the amount of virus detected in wintering areas of migratory birds is several times higher than usual for bird flu, which occurs at an unusual pace.
In the future, we are calling for caution, saying that the virus may spread to poultry farms on the way back to Siberia for migratory birds.
Since November last year, bird flu has occurred in a wide range of western Japan, as well as in 46 poultry farms in 17 prefectures including Chiba and Ibaraki prefectures, and the number of cullings is the highest in one season. It is expected to reach over 9.3 million birds.
A group of Associate Professor Makoto Ozawa of Kagoshima University has been observing every week whether the water collected from the environment of the area where migratory birds fly in Kagoshima Prefecture contains the virus, and this season from November last year to 12 It means that the virus was detected in about 19 out of 56 samples every week on average over the month.
The number of detected samples is more than three times the average of the same period two years ago, and about seven times that of one year ago, which means that the amount of virus in the environment is higher than usual.
In addition, the virus, which is almost undetectable after the beginning of the year, has been detected in an average of 11 samples until the end of January, and it seems that the infection continues among wild birds.
Associate Professor Ozawa said, "If migratory birds start moving to return to Siberia after the middle of this month, the risk will increase at the poultry farm in the middle of the route. I want you to thoroughly manage hygiene such as disinfection." ..