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You do have to worry about infections. Not in the same way, but yeah. Those cells are alive and they can be infected.
I suspect an infection would actually be far more costly, and far more difficult to control. Keep in mind it’s grown vats with a shitload of plumbing attached. Animals have an immune system… these vats don’t. They rely on remaining completely sterile, except for the meat-cells.
The risk of infection during the growth process of cultured meat is lower than in traditional livestock farming. This is because the controlled environment of a bioreactor can be maintained under strict sterile conditions, minimizing the chances of contamination.
Bioreactors (vats) used for growing cultured meat are designed to be aseptic environments where the risk of exposure to pathogens is greatly reduced compared to open farming. The growth medium and other inputs are sterilized and carefully monitored, reducing the likelihood of introducing pathogens, unlike conventional animal farming where antibiotics are often used to prevent infections in crowded conditions, cultured meat production doesn't require antibiotics, reducing the risk of developing antibiotic-resistant bacteria. And since cultured meat production is a closed system, there is less chance for external contamination from sources like other animals, human handlers, space aliens because I know you’re reading this right, or the environment. Also, cultured meat production is subject to regulatory oversight to ensure safety and quality standards are met, similar to other food production methods.
So, just to clarify…. They take all those precautions to prevent an infection, because…. There is a risk of infection… right?
While certainly far from perfectly analogous, my experience with sourdough starter (which is a yeast culture,) says that when it goes off (specifically serratia marcescens) the entire starter needs to be scrapped; and the “bioreactor” (that would be a mason jar, heh.) needs to be sterilized in the dish washer.
As one scales the reactors to comercially-viable size, the risks and costs increase- simply by the mere increase of inputs increasing the risk that something is missed.
As for antiboitic use in cattle, this is certainly common, but it’s also far from universal. My big-box grocery store sells antibiotic-free meat and antibiotic free dairy; and the chain butcher sells it exclusively.
I’m not trying to defend natural meat, but dealing with and preventing infection is a necessity; the largest drawback is scaling. Incidentally, a solution nobody seems to consider here is scaling the other direction- towards smaller, in-home bioreactors.
If they became small enough, maintenance free enough and inexpensive-to-operate enough; people would start adopting them. Like how people frequently grow their own veggies.
Cattle animals are routinely fed a ton of antibiotics in their regular feed. It’s not their “immune systems” keeping them free from infection.