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Pet carriers: Coronavirus spreads between cats, study shows

He and colleagues at the University of Wisconsin School of Veterinary Medicine led the lab experiment and published their results on Wednesday (US time) in the New England Journal of Medicine. US federal grants paid for the work.

Researchers took coronavirus from a human patient and infected three cats with it. Each cat was housed with another cat that was free of infection. Within five days, coronavirus was found in all three of the newly exposed animals. None of the six cats showed symptoms.

“There was no sneezing, no coughing, they never had a high body temperature or lost any weight,” Halfmann said. “If a pet owner looked at them … they wouldn’t have noticed anything.”

Last month, two domestic cats in different parts of New York state tested positive for the coronavirus after mild respiratory illnesses.

They were thought to have picked it up from people in their homes or surrounding areas.

Some tigers and lions at New York’s Bronx Zoo also have tested positive for the virus, as have a small number of other animals around the world.

Those cases and the new lab experiment show “there is a public health need to recognise and further investigate the potential chain of human-cat-human transmission”, the report authors wrote.

Guidelines from the US Centres for Disease Control and Prevention say based on the limited information available, the risk of pets spreading coronavirus to people “is considered to be low”.

The veterinary medicine group says “there is no evidence to suggest that animals, including pets, that may be incidentally infected by humans are playing a role in the spread of COVID-19”.


It stressed that person-to-person transmission was driving the global pandemic.

However, the group noted that many diseases spread between pets and people, so hygiene is always important: wash your hands before and after touching pets, and keep your pet and its food and water bowls clean.

Halfmann, whose two cats sleep near him, said the worry may be greater for animal shelters, where one infected animal could pass the virus to many others.

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