Jan 31, 2025 · H5 bird flu is widespread in wild birds worldwide and is causing outbreaks in poultry and U.S. dairy cows with several recent human cases in U.S. dairy and poultry workers. While the current public health risk is low, CDC is watching the situation carefully and working with states to monitor people with animal exposures.

Jan 28, 2025 · A different strain of H5N9 has shown up in U.S. birds before. Krammer pointed to recent detections of the H5N5 strain spreading from Europe, and then jumping from birds to be able to infect ...

May 30, 2023 · Following sporadic detections of a Eurasian H5N5 avian influenza in Canadian wild birds, officials reported the virus for the first time in mammals—raccoons found dead on Prince Edward Island.

Dec 20, 2024 · HPAI A (H5) or A (H7) virus infections can cause disease that affects multiple internal organs with mortality up to 90% to 100% in chickens, often within 48 hours. However, ducks can be infected without any signs of illness.

Dec 1, 2024 · After a quiet summer with no reported H5N5 cases in northern Europe, October has seen a south-east spread of HPAI H5N5 cases in wild birds through Great Britain and on to the coast of Belgium (a common gull) and Germany (an auk species).

Analyses of HPAI H5 viruses from poultry outbreaks across a wide Eurasian region since July 2020 including the Russian Federation, Republics of Iraq and Kazakhstan, and recent detections in migratory waterfowl in the Netherlands, revealed undetected maintenance of H5N8, likely in galliform poultry since 2017/18 and both H5N5 and H5N1.

May 2, 2024 · Highly pathogenic avian influenza (HPAI) A A (H5) viruses have been detected in U.S. wild aquatic birds, commercial poultry and backyard and hobbyist flocks beginning in January 2022. These are the first detections of HPAI A (H5) viruses in the United States since 2016.

Jul 13, 2024 · Ferrets inoculated with A (H5N5) viruses showed rapid, severe disease onset, with some evidence of direct contact transmission. However, these viruses have maintained receptor binding traits of avian influenza viruses and were susceptible to oseltamivir and zanamivir.

Jul 23, 2024 · Ferrets inoculated with A (H5N5) viruses showed rapid, severe disease onset, with some evidence of direct contact transmission. However, these viruses have maintained receptor binding traits of avian influenza viruses and were susceptible to oseltamivir and zanamivir.

Isolation of 2 novel reassortant highly pathogenic avian influenza (H5N5) viruses from apparently healthy domestic ducks highlights the role of these ducks as reassortment vessels. Such new subtypes of influenza viruses may pose a pandemic threat.