Since new covid forms could spread to humans as a result of mutations in the virus in animals, the CDC has revised its previous guidelines.
The Centers for Disease Control and Prevention is now urging health officials to step up their efforts to periodically track virus infections in animals, citing concerns about the new coronavirus strain in American wildlife and sending it back to humans.
The CDC’s revised policy, which removes an earlier recommendation that state agencies “avoid regular animal testing”, comes at a time when top officials across the country are meeting to determine strategies for the threat. This is part of the CDC’s “One Health” project, which emphasizes how human health is “closely linked to animal health and our shared environment.”
It follows a similar advice from the World Health Organization last month, highlighting the threat posed by the virus in North American deer.
In January, at least one-third of white-tailed deer blood samples obtained by the Department of Agriculture’s Animal and Plant Health Inspection Service (APHIS) in four states – Illinois, Michigan, New York and Pennsylvania – were found to contain antibodies to the virus.
Several additional efforts to study the spread of the virus in American wildlife have been funded by the EPA, including efforts to test wildlife near rats and mink farms in New York City’s sewerage system. Mink seems to be very at risk for the virus and in some cases it has contacted people.
“These and other wildlife surveillance projects are important because scientists estimate that three out of every four new or emerging infectious diseases in humans come from animals,” said Lindsay Cole, an APHIS spokeswoman.
According to Cole, the chances of animals transmitting SARS-CoV-2 to humans on the basis of “limited data available” are negligible. APHIS, on the other hand, advises Americans to keep a safe distance from wildlife and their dropping off their families, including dogs.
Researchers in Canada recently discovered signs of “spillback” from deer – the virus is being transmitted to humans – in a report with a highly modified form that has not yet been peer-reviewed.
“Given our current state of epidemic knowledge, we have updated the CDC’s assessment for SARS-CoV-2 testing in animals to reflect that surveillance efforts are now critical for early detection and prevention of virus transmission in animals, especially wildlife. Jasmine Reed, a spokeswoman for the CDC, said in a statement.
Although this is not the first virus that public health officials are trying to track and prevent from spreading to humans and animals, deer appear to be the only animal in North America that has spread SARS-CoV-2 in the wild.
“We are starting to see deer transmission from skilled deer. In other words, when deer get it, we see that it actually adapts to deer, and because of their nature, they can spread together in the congregation, “added Jeff Bender of the University of Minnesota.
As part of a study supported by the CDC and the Council of State and Territorial Epidemiologists, Bender led a pilot effort in Minnesota that tested hundreds of wild animals for SARS-CoV-2. Only white-tailed deer were found to be positive.
While isolated COVID-19 cases have been found in hundreds of animals across the country, from domestic pets to zoos, APHIS has only found wild cases of stork-covy-2 deer spreading across the country.
Who knows the ways in which SARS-CoV-2 entered the deer? Both you and I can make a list and they will all be valid, either through close contact with a deer, through feeding, or by baiting, or through deer farming as well as zoo rearing. And only people with close contact can have deer in their backyard, ”said Colin Gillin, a wildlife veterinarian in Oregon and vice chairman of the Health Committee of the Association of Fish and Wildlife Agencies.
Gillin said he is meeting with experts from various state and federal agencies, including the CDC and the Department of Agriculture, to discuss possible new ways to track and respond to the virus in wildlife.
“Of course there is no order on any of these, because each state makes its own decision. But they can take some tools or ideas from all these experts, and then look at the list as it relates to your state, and then decide to use something that comes out of the committee, “added Gillian.
Based on the modeling of agencies, states may change their surveillance or decide to limit the feeding or management of wild deer, for example, Gillian speculates.
Bender, who previously served as director of the One Health Workforce Project at the United States Agency for International Development, cited other diseases, such as Ebola and the West Nile virus, where different government agencies work together to find ways to reduce the risk of infection. Between wildlife and humans.
“Such projects really require the strength and cooperation of state and regional partnerships and fall into that one health concept,” Bender added.
According to Bender, experts have already begun collaborating on strategies to reduce the risk of SARS-CoV-2 spreading in animals, such as treating wastewater or vaccinating zoo animals, as well as educating the public.
Some governments have taken tougher measures in response to outbreaks involving animals in captivity abroad.
Denmark started killing its mink population in 2020 In January, Hong Kong ordered euthanasia of thousands of hamsters and other small animals due to record-breaking heat waves. However, as Bender noted, within the wildlife population, this is not really a choice.
“One thing we don’t want to do, and we’ve historically seen, ‘Oh, we have to kill wildlife.’ And it’s not really an effective strategy, “he added.
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