Medical technology

Livestock and mRNA Vaccines: What You Need To Know

Fri, 27 Sep 2024 01:56:42 GMT

As misinformation regarding the use of mRNA vaccines in livestock filter through social media, there are facts begging to be set straight.

Recently, a claim was made saying producers are required to inject livestock with mRNA vaccines.

According to USDA spokesperson, Marissa Perry says, “There is no requirement or mandate that producers vaccinate their livestock for any disease. It is a personal and business decision left up to the producer and will remain that way,” in response to the claim, Associated Press shared in an article .

National Pork Board’s Director of Consumer Public Relations, Jason Menke echoed the statement to AP, noting that the decision to use vaccines and other medical treatments to protect animal health and well-being are made by the farmer under the direction of the herd veterinarian.

To further explain mRNA vaccines and shed light on controversies, Dr. Kevin Folta, a molecular biologist and professor at the University of Florida, shares his viewpoint and experience with the technology.

What are mRNA Vaccines?

First introduced to the population through the COVID-19 vaccines, mRNA (messenger ribonucleic acid) vaccines have been in development for decades, says Folta in a recent AgriTalk segment.

He adds that the technology’s potential in human health makes it a likely candidate to have a place in animal health as well. However, “the technology is being maligned in social media, and is now shaping decisions at the level of state legislature,” Folta says. This leads to the growing importance that producers and consumers become more educated on the topic.

What Folta believes began in January of this year, based on claims with very little data, certain advocates against mRNA vaccines are concerned that mRNA vaccines are in use and development in livestock. Additionally, these vaccines may then be present in the food these animals provide.

Why mRNA Vaccines Are Not Present in Food

“It’s not in your food. It’s a vaccine for the animal that, just like any vaccine, protects the animal from disease,” Folta says.

Current mRNA vaccines being used in swine are injected into the muscle, Folta explains, which causes the development of the immune response protein to then stimulate the body to work against the virus.

“In the absence of the virus, it’s kind of like giving the virus or giving the body a ‘wanted’ poster that says, ‘when this individual comes along, and this virus comes along, work against it,’ and it’s all gone within hours,” he adds.

The mRNA never leaves the cells from where it was injected. RNA is a very unstable molecule that must be kept cold, buffered and in solvent, to remain viable, Folta explains.

Additionally, any licensed vaccine comes with a minimum time before that animal can enter the food chain, also known as the “withdrawal time,” says Alan Young, professor in the Department of Veterinary Biomedical Sciences at South Dakota State University and founder of protein platform (non-mRNA) vaccine company Medgene.

The Animal’s Genes Are Not Altered

While mRNA vaccines include genetic code, Folta says the use of a mRNA vaccines does not alter the animal’s genes in any way.

“This [mRNA] is an intermediate between the gene itself and the products that the gene encodes. So, it’s like having a blueprint and a house. The mRNA is like the construction worker. It takes the blueprint and manufactures the house. In the case of the cell, it takes the DNA blueprint and then takes a little bit of that information to build part of the final structure. The mRNA is just that intermediate, it does not change the genes. It doesn’t change the DNA itself,” he explains.

What are the Benefits of mRNA Vaccines?

More flexibility and faster response to new disease, Folta describes as reasons why mRNA vaccines are becoming more popular.

Traditional vaccines require large amounts of a virus to be raised and purified before being injected to elicit an immune response, he adds. Meanwhile, mRNA encourages the body to make a little piece of protein to elicit the desired immune response.

“It’s much cleaner, much easier. If you’re moving parts in this machine, to make this product that induces an immune response, it’s so good in so many ways,” Folta says.

In pork production specifically, researchers are working with mRNA vaccines that will work this way against porcine reproductive and respiratory syndrome (PRRS), which is a viral disease that causes economic loss totals around $664 million per year in the U.S. (Holtkamp et al., 2013).

Additionally, the use of mRNA technology adds another tool to the toolbox, which may be helpful in combating diseases, such as African swine fever (ASF), avian influenza and other food-animal diseases.
“This stands to be a revolutionary technology if we don’t get in the way,” Folta adds.

Are There Risks to mRNA Vaccines?

Folta says everything has some sort of risk, but it’s important to weigh the benefits against the risk.
As seen with the COVID-19 vaccines, in rare cases, people experienced side effects from the vaccine. However, Folta is encouraged by the initial results in livestock.

“If you look in animals where these [vaccines] have been used, there have been no unusual effects noted. Everything potentially has risk, but it’s monitored, and especially in large animal populations, we can look very carefully at that for surveillance,” he explains.

mRNA Enters State Legislation

While some consumers spread misinformation about the use of mRNA vaccines, the ideas have also crept into state legislation.

The Missouri House Bill 1169 , with a special hearing set for Apr. 19 on the matter, aims to require a label be used on meat from animals treated with an mRNA vaccine, identifying the “potential gene therapy product.”
This bill falsely claims that mRNA vaccines would modify the genes of the organism, Folta explains.

mRNA vaccines are simply another modality that can protect animal health, which results in healthy animals producing the best and safest food products, Folta says, and provides producers with more options to help combat disease.

“To have affordable food, we need to have continual innovation in the animal, medical, veterinary space and mRNA vaccines are safe and an effective way to treat the animal that does not change the final product,” he adds.

The COVID-19 pandemic simply “broke the seal” to the development of these new modalities that will change the way human and animal diseases will be treated in the years to come.

More on Vaccines:

Genvax Technologies Secures $6.5 Million to Advance Novel Vaccine Platform

Cattle Veterinarians Have New Vaccination Guidelines

Don’t Assume That Old Refrigerator Is Good Enough To Store Vaccines

OTC Livestock Antibiotics Will Require Prescription June 11

Life-Saving Find: How This Missouri Soil Unearthed A Golden Medical Discovery 75 Years Ago

Take a step onto Sanborn Field at the University of Missouri–Columbia, and it’s a step into history.

“I’m walking in some big footsteps here,” says Tim Reinbott, the director of Sanborn Field at the University of Missouri.

Sanborn Field is the third-oldest continuous research farm in the world, but the oldest west of the Mississippi River. Nestled on the eastern edge of campus, buildings and housing have sprouted all around the field, but it’s still the root of significant scientific discoveries that are benefiting farmers and ranchers.

“We probably got more treatments than anybody else,” Reinbott explains. We have had continuous treatments for 135 years, and we’ve learned so much. And this is where so many of our common agricultural practices all started from the dollars that we gained here.”

One of the biggest breakthroughs happened 75 years ago, as the soil became the foundation of medicine still used today in humans and livestock.

“One of the interesting facts that is often overlooked is that in any soil you will find antibiotics, because it’s just the nature of how these bacteria survive in nature,” says Bob Kremer, adjunct professor of soil microbiology at the University of Missouri (Mizzou).

An Important Plot

Seventy-five years ago, Plot 23, which is still located within Sanborn Field at the university, became home to a groundbreaking discovery.

“We have to keep in mind that that was the age of the antibiotic discovery in the United States and worldwide,” Kremer says.

“Seventy-five years ago, we had known about penicillin. We had known other types of antibiotics, but they were only about 40% effective,” Reinbott explains.

“And they were looking for that golden antibiotic, that one that would really be very effective and be taken orally, not by injection.”

With so much effort to find microorganisms that could produce an antibiotic that wasn’t just effective but not toxic to humans or animals, researchers at Sanborn Field were on a mission.

“Benjamin Duggar, a gentleman that was a former faculty member here was working for Lederle Laboratories at the time, and he knew the director of Sanborn Field, who was William J. Albrecht, who was the soil microbiologist. Mr. Duggar asked him for some soil samples from Sanborn Field, that he could begin to culture for these microorganisms for some sort of an antibiotic that would serve those purposes.”

A Solution in Soil

The soil contained a golden mold that suppressed the growth of many microorganisms, including streptococci, a bacteria that causes various types of infections. From the sample, researchers eventually created aureomycin, which proved to be an antibiotic effective against 90% of bacteria-caused infections in humans.

“Dr. Albrecht then directed and assisted in collecting soil samples from Sanborn Field, which included plot 23 here, which is in continuous Timothy (grass) that had no fertilizer or manure amendments since it was established in 1888,” Kremer says.

“He knew that this plot right behind us (plot 23), that had been for 60 years managed the same way, was a perennial crop, but had no inputs. He knew we should have a lot of biology but a pretty hostile environment for them. If any place could have an antibiotic, it’s going to be here,” says Reinbott, as he stands in front of the birthing ground of aureomycin.

It was later that year, in 1945, they made the big discovery — one that proved to be a breakthrough in the medical world, for both humans and animals.

“They called it aureomycin, and ‘aureolus’ is the Latin word that means a golden color,” Reinbott adds. “It’s an antibiotic that’s been used for decades, and it’s still being used in animals. It’s also the best treatment there is today for Rocky Mountain spotted fever.”

Reinbott says for the first 30 to 40 years after the discovery of aureomycin, it was the go-to antibiotic for human medicine, but it also grew in popularity within animal medicine.

“The aureomycin antibiotic and the tetracycline cyclin class are still very useful today, because of their mechanism of action. They attack protein synthesis in the cell of these bacteria, and (are) effective on these rickettsia diseases, like the Rocky Mountain spotted fever. Because those particular bacteria are able to infect and inhabit deep within the tissue of a human being, they also do not become resistant,” Kremer says.

Life-Saving Treatment

First discovered at the end of 1945, aureomycin underwent clinical trials and was then approved by FDA to address human ailments, starting in 1948. One of the first recipients was a young boy, Tobey Hockett, who at the time, lived just outside of Washington, D.C.

“I was born Sept. 11, 1943,” says Hockett, who is now retired and lives in Florida. “Sometime around early 1949, I got a real bad stomachache. My parents did not pay attention, and it got worse and worse before they finally rushed me to the hospital. It turns out that I had peritonitis. I had a ruptured appendix.”

Hockett says the doctors didn’t give his parents much hope for his recovery, but the doctors wanted to treat Hockett with an antibiotic that had recently been developed, which was aureomycin. He remained in the hospital for one month.

Hockett says Mizzou’s discovery 75 years ago not only saved his life, but he went on to become a defense attorney and worked to save other lives. He took on death penalty cases and helped clients through drug court.

“You can’t express thanks in words,” Hockett says. “The only thing I think about is what I’ve been able to do with my life as a result of surviving that.”

Soil Sample Goes To Smithsonian

To celebrate the discovery of aureomycin, a soil sample from Plot 23 was sent to the Smithsonian Institution where it still resides today.

The discovery at Sanborn Field wasn’t just a breakthrough for human medical science, it was also a breakthrough for livestock.

“It’s very interesting, because they discovered that it was very useful not only to prevent some of these infections, but it also is a growth promoter,” Kremer says. “In the early 1950s, they discovered that chickens, for example, grew two and a half times quicker than the traditional feed that was being used at the time.”

Aureomycin is still widely used in cattle today. Such an antibiotic discovery is estimated to cost $1.5 billion in 2023 dollars.

“We’ve more aureomycin discoveries out here, we’ve just got to look for them,” says Reinbott, standing at Sanborn Field. “It may or may not be an antibiotic, but it can be something just as groundbreaking, and that’s what gets me excited.”