In brief
Researchers are raising concerns about the possibility that domestic cats could serve as carriers of the H5N1 bird flu virus, particularly if they were exposed to both H5N1 and seasonal flu strains. The study suggests bolstering surveillance in felines to prevent potential risks to human health.
In a recent study, experts indicate that domestic cats may present a new and concerning avenue for the bird flu virus H5N1 to evolve into a more perilous form. Published on December 11, 2024, the research highlights that since H5N1 has been detected among dairy cattle, it has resulted in numerous feline fatalities, predominantly on farms with infected herds. To date, at least 60 human cases linked to close contact with infected cows or poultry have also been reported.Currently, H5N1 does not appear to transmit efficiently among humans. Nonetheless, scientists warn that a single mutation, or just a few, could enable the virus to jump to humans effectively. Although there is no concrete evidence suggesting that cats can transmit H5N1 to people, experts are particularly focused on the risk that might arise if a cat were co-infected with both H5N1 and a seasonal flu virus, potentially allowing H5N1 to acquire mutations that facilitate human transmission.This need for vigilance is underscored by Dr. Suresh Kuchipudi, a veterinary microbiologist from the University of Pittsburgh and co-author of the paper, who emphasizes the implications of heightened surveillance of cats due to their interactions with wildlife and humans.Compounding these concerns is the limited testing of cows and individuals for H5N1 until recently, which has obscured the widespread impact of the outbreak within the dairy sector. The U.S. Department of Agriculture has now announced plans to conduct tests on the national milk supply to aid in identifying potentially infected herds, an initiative aimed at addressing the gaps in surveillance and ensuring public health safety as the situation evolves.
