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An outbreak of H5N1 killed 70% of Southern elephant seal pups born in the 2023 breeding season. In surveyed areas of Península Valdés, Argentina, seal mortality rates reached 96%. [7] In February 2024 it was estimated that the outbreak of H5N1 in South America had killed at least 600,000 wild birds and 50,000 mammals since 2022. [7]
Public health officials are continuing to monitor an outbreak of avian influenza, also known as bird flu, as it spreads across the U.S. ... known as H5N1, ... PHOTO: In this May 21, 2023, file ...
Dairy cows at a farm near Pixley, Calif., in 2023. ... "On one hand, we see concerning evidence that there may be more H5N1 outbreaks on farms than are being reported," she said. "On the other ...
By midyear of 2003 outbreaks of poultry disease caused by H5N1 occurred in Asia, but were not recognized as such. That December animals in a Thai zoo died after eating infected chicken carcasses. Later that month H5N1 infection was detected in 3 flocks in the Republic of Korea. [13] H5N1 in China in this and later periods is less than fully ...
Most researchers believed there was a singular contact event between a bird infected with H5N1 B3.13 and a dairy cow in the Texas Panhandle in late 2023. That interaction led to an outbreak that ...
H5N1 influenza virus is a type of influenza A virus which mostly infects birds. H5N1 flu is a concern because its global spread may constitute a pandemic threat. The yardstick for human mortality from H5N1 is the case-fatality rate (CFR); the ratio of the number of confirmed human deaths resulting from infection of H5N1 to the number of those confirmed cases of infection with the virus.
The H5N1 avian flu has impacted more than 160 million birds, resulting in the deaths of 20 million egg-laying chickens since 2022. ... The USDA surveils farms to detect outbreaks of avian flu.
Influenza A virus subtype H5N1 (A/H5N1) is a subtype of the influenza A virus, which causes the disease avian influenza (often referred to as "bird flu"). It is enzootic (maintained in the population) in many bird populations, and also panzootic (affecting animals of many species over a wide area). [1]