Can livestock get COVID-19?

While there’s no evidence so far that pets, livestock, or their owners can infect each other with COVID-19, there’s also very little research about a potential crossover.

The novel coronavirus started with an animal, then mutated to transfer to people, but research hasn’t yet shown if the virus has jumped back to animals, said Scott Kenney, a researcher at The Ohio State University College of Food, Agricultural, and Environmental Sciences (CFAES).

“Viruses are constantly sampling and evolving, trying to find other hosts,” said Kenney, who studies coronaviruses, including those that cross over from one species to another.

Quickly spreading among people across the world, COVID-19 is believed to have originated in bats, but the bat virus changed, altering surface proteins to be able to efficiently transfer from person to person. These surface proteins are different in the mutated bat virus, so COVID-19 is now less likely to affect the original bats. Whether other animals are susceptible to COVID-19 has yet to be tested, Kenney said.

When viruses infect an animal, they produce billions of copies of themselves. Some of the copies tend to be slightly changed from the original virus. While most of these irregular copies die, occasionally one has a change that is beneficial for the virus, such as altering its ability to infect a different species, Kenney said.

“If the new species is exposed to this altered virus, it can now make many more copies of itself and potentially infect a whole new species,” he said.

So far, the only research on COVID-19 and animals involves studies in China that showed two dogs tested positive for COVID-19. But neither of the infected dogs had symptoms of the virus, and researchers in those studies do not believe they transmitted the disease to any other animals or people, Kenney said.

Coronaviruses are a large family of viruses, with COVID-19 being the newest addition. Some coronaviruses cause illness in people, some cause illness in certain animals, and others sicken both people and animals. Severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS) were both coronaviruses that started in animals and shifted to people, leading to outbreaks. Neither was as adept at transmitting to people as COVID-19, Kenney said.

“COVID-19 has managed to hit a virus evolution sweet spot,” Kenney said. “Infected people can be either very sick or show few signs, leading to very rapid spread of the infection.”

Coronaviruses are common among farm animals.

If COVID-19 were to jump species again and be receptive to animals, a likely animal on the farm to catch it would be pigs, Kenney said. That’s because pigs have a similar protein to humans that the SARS virus, a coronavirus cousin to COVID-19, uses to infect humans. Studies show that it may work in pigs, too.

Among farm animals, pigs seem to be the most susceptible to coronaviruses, able to contract up to six different pig-specific coronaviruses, Kenney said.

“I’m not sure anyone really knows why,” he said. “Outside of bats, pigs and humans seem to be infected by the largest numbers of different coronaviruses.”

More studies are needed to understand whether this is because of something in pigs’ physiology or genetic makeup, or just that humans and pigs encounter coronaviruses more frequently than other animals. And that results in more virus spillovers, Kenney said.

One of the more devastating coronaviruses among livestock in recent years affected only pigs: the porcine epidemic diarrhea virus. During a 2013 outbreak, the virus killed significant numbers of pigs in the United States and China, all of them young pigs.

“The virus continues to pop up and cause problems in many countries around the world,” Kenney said.

Even if farmers have spent a lot of time around pigs or other livestock, including animals with coronaviruses, they do not have immunity to COVID-19, Kenney said. That’s why it is still important to be cautious.

“Any time you’re around an animal, you should use good hygiene,” he said. “There are many illnesses besides coronaviruses in animals that can be passed to humans, and vice versa.”

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3 comments

  1. From what you are writing, it appears that livestock can be infected with COVID-19. This may explain, in part, outbreaks among workers at meat processing facilities.

    The next questions then are: Is our meat supply safe? Can exposure to raw meat be a potential source of infection? I think the answer to the first question is: yes, the meat supply ss safe. To answer the second question, blood borne transmission of COVID-19, whether it be human-to-human or animal-to-human, has not been reported. It would be nice to have solid data on these questions in order to reassure the public.

    What about meat handling: Could workers contaminate meat and packaging? That is a possibility that also needs to be addressed.

  2. United States Department of Agriculture, Animal and Plant Health Inspection Service, “Confirmation of COVID-19 in Two Pet Cats in New York” —“Washington, D.C. April 22, 2020 – The U.S. Centers for Disease Control and Prevention (CDC) and the United States Department of Agriculture’s (USDA) National Veterinary Services Laboratories (NVSL) today announced the first confirmed cases of SARS-CoV-2 (the virus that causes COVID-19) infection in two pet cats. These are the first pets in the United States to test positive for SARS-CoV-2.”

    USA Today, “A North Carolina pug tested positive for coronavirus, possibly the first dog in the U.S.”, April 28, 2020 — After several members of a North Carolina family tested positive for the new coronavirus, they found out their pet pug tested positive, too, … owner Heather McLean, a hospital pediatrician … “My dad heard him cough a lot,” she said. “He didn’t eat his breakfast one morning and it’s weird because he’s a pug, but who knows?” …Heather and her husband, Sam, who works as a researcher and emergency physician at UNC-Chapel Hill, started developing mild symptoms in mid-March.

    As only 1 out of every 100 ordinary people can get a COVID test, I expect the numbers for animals is more like 1 in 10,000. So there are probably – at least – tens of thousands of cases of pet COVID in the US, and that’s not counting livestock. I know pigs are smart, but can they be taught to practice social distancing?

    “Will the coronavirus survive in the refrigerator or freezer?”, New Jersey COVID Information Hub — “A 2010 study used two viruses that are related to the COVID-19 virus to look at the effects of temperature and humidity on viral survival. Researchers found that both lower temperatures and lower humidity helped viruses survive longer. In particular, at 4 degrees C, or 40 degrees F, and 20% relative humidity, more than two thirds of the viruses survived for 28 days. On the other end of the spectrum, at 40 degrees C, or 104 degrees F, and 80% humidity, the viruses survived for less than 6 hours.”

    On the consumer end, the same precautions taken to avoid salmonella poisoning should work for COVID. Put meat in a separate bag/package right from getting it off shelf. Keep it isolated from other food. Use cheap disposable gloves when preparing, or if not at least wash hand immediately. Wash all contact surfaces immediately. My wife laughed at my precautions until she got very sick after preparing chicken, even though we both ate the same chicken and I didn’t get sick. Now she is much more careful. (Once it’s cooked it is perfectly safe).

    • People Are Assholes

      you are quite the piece of shite arent you?

      what kind of a**hole diseases animals for their short term gain? stop abusing animals you dumb f*ck.

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