CORVALLIS, Ore. – As flu season approaches, people who get sick may not realize they can pass the flu not only to other humans, but possibly to other animals, including pets such as cats, dogs and ferrets.

comment: This has been emphatically denied by most vets for decades. New studies also show that Norovirus may spread from humans as well. According to the article -

This concept, called “reverse zoonosis,” is still poorly understood but has raised concern among some scientists and veterinarians, who want to raise awareness and prevent further flu transmission to pets. About 80-100 million households in the United States http://bit.ly/PaJqer" rel="nofollow - have a cat or dog .

It’s well known that new strains of influenza can evolve from animal populations such as pigs and birds and ultimately move into human populations, including the most recent influenza pandemic strain, H1N1. It’s less appreciated, experts say, that humans appear to have passed the H1N1 flu to cats and other animals, some of which have died of respiratory illness.

There are only a handful of known cases of this phenomenon and the public health implications of reverse zoonosis of flu remain to be determined. But as a concern for veterinarians, it has raised troubling questions and so far, few answers.

Veterinary researchers at Oregon State University and Iowa State University are working to find more cases of this type of disease transmission and better understand any risks they pose to people and pets.

“We worry a lot about zoonoses, the transmission of diseases from animals to people,” said Christiane Loehr, an associate professor in the OSU College of Veterinary Medicine. “But most people don’t realize that humans can also pass diseases to animals, and this raises questions and concerns about mutations, new viral forms and evolving diseases that may potentially be zoonotic. And, of course, there is concern about the health of the animals.”

Medclinician