Here are a couple of quick H5N1 flu updates about which I’ve been wanting to write. Neither is very surprising, but they highlight (again) some issues of concern.
(Presumed) fatal H5N1 influenza infection in a cat
An outdoor cat in Washington State tested positive for H5N1 influenza. Spillover of H5N1 infection into cats isn’t new.
A few months ago, there was a cluster of kittens from a dairy goat farm in the Netherlands that likely all died from H5N1 influenza (only one kitten was tested). That wasn’t too surprising since the H5N1 virus is circulating in wild birds internationally, and we know that cats are highly susceptible to the
Details have now been released about the information that was briefly posted then removed from the US CDC website a couple weeks ago regarding suspected household transmission of H5N1 flu to and from cats. It’s great to have more details, but (as is common with emerging diseases) the full story probably raises more
I think it’s fair to say H5N1 becoming seemingly endemic in US dairy cattle in the past year caught us off guard. The virus has spread widely within and between US dairy herds, has caused mild infections in a number of people in close contact with infected cows, has killed a lot of cats on
A lot of infectious disease events get over-hyped by the media, which makes it a bit surprising that this case has flown a bit under the radar. It’s not a sign of an impending “influenza apocalypse,” but it’s a warning sign that more may be going on lately with flu viruses than we’ve been able
There’s a great new early-release paper in Emerging Infectious Diseases (Oguzie et al. 2024) about the emerging situation with H5N1 influenza in dairy cattle. It provides some important new information, and more details that somewhat challenge the early narrative.
The authors explain some of the limitations of the study to keep in
For such a potentially big problem, we’re received disappointingly little official information about H5N1 influenza on dairy farms in the US. The more we know, the better we can plan for containment and control, wherever it pops up next. If information isn’t being gathered or isn’t being shared, our ability to address this problem
We know a lot more about the situation with H5N1 influenza in dairy cattle than we did a couple of weeks ago, thanks to ongoing research and (more importantly) better disclosure of information that has been held pretty tight up until now.
Current situation with infected dairy herds in the US
Rather than focus
Dairy cows produce a lot of milk. That’s great when you’re producing it for sale. It’s not great when you have to get rid of it.
It’s clear that this H5N1 flu virus has an affinity for the udder, and a lot of virus is shed in the milk of infected dairy cattle. It
