Avian Flu Strain Transmissible to Humans Reappears on a US Farm

Published 2025년 3월 18일

Tridge summary

A commercial broiler breeder flock in Mississippi has been infected with the highly pathogenic avian influenza (HPAI) H7N9 strain, marking the first detection of this strain in the United States since August 2017. An additional H5N9 strain was also identified for the first time in the country. The outbreak has led to the euthanization of over 47,600 chickens. The H7N9 strain has been responsible for severe respiratory problems in human cases, with the CDC reporting 1,668 infections and 616 deaths from 2013 to 2021. The United States is already grappling with the presence of the H5N1 strain in animals, with concerns of a potential future pandemic, especially after the first human death related to the H5N1 virus in early January.

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Original content

“Highly pathogenic avian influenza (HPAI) H7N9 from the North American strain associated with wild birds was detected in a commercial broiler breeder flock in Mississippi,” in Noxubee County, the agency said in a report. The tests were confirmed last week. The last detection of this strain in the United States dates back to August 2017. Another strain, H5N9, was also identified for the first time in the country in late January. More than 47,600 chickens have been euthanized at the affected farm, the Paris-based organization said. The H5N1 and H7N9 strains, detected in 1997 and 2013 respectively, have been primarily responsible for human cases of avian flu, according to the Centers for Disease Control and Prevention (CDC). The H7N9 strain can cause severe respiratory problems. Between 2013 and 2021, the H7N9 virus infected 1,668 people and caused 616 deaths, according to the Food and Agriculture Organization of the United Nations (FAO). The United States is already facing a ...

Source: Agromeat