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Reverse zoonosis causes concern
reverse zoonosis concern influenza flu season transmission illness
Humans must beware of passing flu on to their pets

The concept of reverse zoonosis, in which humans can pass illness on to their pets, is causing concern with the approach of the influenza (flu) season.

Many people do not realise they can not only pass flu on to other humans when they get sick, but also animals, including dogs, cats and ferrets.

Scientists and vets hope to help prevent reverse zoonosis by raising awareness of the issue.

It is well known that animals such as pigs and birds introduce new strains of flu to humans, such as the most recent H1N1 flu strain, however, it is less known that humans have further passed these on to other animals.

There is currently little known about reverse zoonosis by scientists and vets, however researchers at Oregon State University (OSU) and Iowa State University are looking at this type of disease transmission.

"We worry a lot about zoonosis, the transmission of diseases from animals to people," said Christine Loehr, an associate professor at the OSU College of Veterinary Medicine. "Any time you have infection of a virus into a new species, it's a concern, a black box of uncertainty.

"We don't know for sure what the implications might be, but we do think this deserves more attention."

Professor Loehr advises that people with flu-like symptoms distance themselves from their pets in future.

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Giant tortoise population recovers from brink of extinction

A population of endangered giant tortoises, which once fell to just 15, has recovered on the Galapagos island of Espanola.

Forty years ago, the first captive-bred tortoises were introduced to the island by the Galapagos National Park Service. According to new research, published in the journal PLOS ONE, they are now reproducing and restoring some of the ecological damage caused by feral goats that were brought to the island in the late 19th century.

James P. Gibbs, a professor of vertebrate conservation biology and lead author of the paper, said: "The global population was down to just 15 tortoises by the 1960s. Now there are some 1,000 tortoises breeding on their own. The population is secure. It's a rare example of how biologists and managers can collaborate to recover a species from the brink of extinction."