Bird Flu in Mammals

Close-up portrait of a tabby cat with striking green eyes and long whiskers.

A Timeline of H5N1 infections in Cats

Recently, there have been more reports of cats dying from H5N1 bird flu after eating contaminated pet food or otherwise exposed to the virus.  Indeed, just last week, health authorities in New York City confirmed the deaths of 2 domestic cats from H5N1 after eating raw poultry products.   The USDA currently lists over 100 confirmed […]

H5N1 infections in domestic cats

Cat deaths from H5N1 positive raw pet food prompt new FDA rules

Recently, a number of domestic cats have died from H5N1, some after consuming raw milk and others after consuming raw pet food positive with the virus.   We saw this in early December when the LA health department reported two cats had died after consuming raw milk, with H5N1 subsequently confirmed as the cause. Several days

New H5N1 ferret study suggests higher viral shedding with current bird flu virus compared to older strains

“Interestingly, whereas in older studies A(H5) viruses . . . were never transmitted via the air between ferrets, low levels of transmission have lately been observed for recently emerged clade 2.3.4.4b A(H5) viruses isolated from a European polecat, mink and dairy cows. These observations raise concerns regarding the evolution of an A(H5N1) towards mammalian, and

mink farm, ferret studies

Why the spread of H5N1 at a Spanish mink farm matters

An outbreak of bird flu in October 2022 spread rapidly through a mink farm in the Galicia region of Spain. This received massive media coverage, as it renewed concerns that the virus could adapt to humans. But this outbreak was part of the much larger, unprecedented, currently ongoing H5N1 panzootic that has caused massive losses in

H5N1 Bird Flu and Mass Mortality in Mammals

The H5N1 strain of Highly Pathogenic Avian Influenza, what we typically refer to as bird flu, has infected an unprecedented number of wild birds and mammals around the world. This global pandemic in animals, a “panzootic,” is unprecedented because never before have so many different species been infected with this virus.  On another note, I have