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Deer COVID

In case you were running low on things to feel anxious about.

Scientists have evidence that SARS-CoV-2 spreads explosively in white-tailed deer and that the virus is widespread in this deer population across the United States.

Researchers say the findings are quite concerning and could have vast implications for the long-term course of the coronavirus pandemic.

Since SARS-CoV-2, the coronavirus that causes the disease COVID-19, first emerged, there have been several signs that white-tailed deer would be highly susceptible to the virus — and that many of these animals were catching it across the country.

In September of last year, computer models suggested SARS-CoV-2 could easily bind to and enter the deer’s cells. A recent survey of white-tailed deer in the Northeast and Midwest found that 40% of them had antibodies against SARS-CoV-2.

Now veterinarians at Pennsylvania State University have found active SARS-CoV-2 infections in at least 30% of deer tested across Iowa during 2020. Their study, published online last week, suggests that white-tailed deer could become what’s known as a reservoir for SARS-CoV-2. That is, the animals could carry the virus indefinitely and spread it back to humans periodically.

If that’s the case, it would essentially dash any hopes of eliminating or eradicating the virus in the U.S. — and therefore from the world — says veterinary virologist Suresh Kuchipudi at Penn State, who co-led the study.

[…]

From April to December of last year, about 30% of the deer that they tested were positive for SARS-CoV-2 by a PCR test. And then during the winter surge in Iowa, from Nov. 23, 2020, to Jan. 10 of this year, about 80% of the deer that they tested were infected. At the peak of the surge, Kapur says, the prevalence of the virus in deer was effectively about 50 to 100 times the prevalence in Iowa residents at the time.

During this time frame, the team also sequenced the genes of nearly 100 samples of the virus. They found the variants circulating in the deer matched the variants circulating in people.

Those genomic sequences suggest that during the pandemic, deer have caught the virus from people multiple times in Iowa alone, Kapur says. “The data are very consistent again with frequent spillover events from humans into deer and then transmission among the animals.”

Virologist Linda Saif at Ohio State University’s College of Veterinary Medicine says humans are likely infecting white-tailed deer across the country. The white-tailed deer is native to North America, Central America and the northern edge of South America. In the U.S. alone, there are an estimated 30 million animals.

“We also have detected the virus in deer in Ohio,” she says. “And there are antibody studies that suggest the prevalence of COVID infections among deer are pretty high in the Midwest and East.”

Although the virus doesn’t seem to make the animals sick, Saif says, the new data from Iowa are “very concerning.”

“Now the question is: Can the virus spill back from deer to humans? Or can deer transmit the virus effectively to grazing livestock? We don’t know the answers to those questions yet, but if they are true, they’re obviously concerning,” she says.

Yeah, I’d say so. Have I mentioned lately that getting vaccinated, and then getting boostered when you need to, is a really good idea? The odds are that sooner or later, we’ll all need a different version of the COVID vaccine, just because some awful new variant has arisen. This is the same reason why we need new flu shots every year. The sooner we accept that reality, the better off we’ll all be. USA Today and Texas Public Radio have more.

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2 Comments

  1. David Fagan says:

    10 days and counting………

  2. Jason Hochman says:

    Of course with an animal reservoir, you aren’t going to eliminate this virus, and of course, it can probably be carried by other animals. I believe it’s been detected in cats and dogs. Probably also in bats, coyotes, squirrels, and other wild mammals. So it’s never going away. It is unpredictable due to having been created in a lab at tax payer expense.