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Source: Health Tips  Jun 30, 2020  3 years, 7 months, 4 weeks, 17 hours, 31 minutes ago

Warning! Health Tips: Raw Milk Can Be Harmful As It Holds A Large Amount Of Antimicrobial-Resistant Genes

Warning! Health Tips: Raw Milk Can Be Harmful As It Holds A Large Amount Of Antimicrobial-Resistant Genes
Source: Health Tips  Jun 30, 2020  3 years, 7 months, 4 weeks, 17 hours, 31 minutes ago
Health Tips: According to a new study from researchers at the University of California-Davis, raw or unpasteurized cows' milk from U.S. retail stores can hold a huge amount of antimicrobial-resistant genes if left at room temperature, The research also found bacteria that harbored antimicrobial-resistant genes can transfer them to other bacteria, potentially spreading resistance if consumed.

Lead author Dr Jinxin Liu, a postdoctoral researcher in the Department of Food Science and Technology at University Of California-Davis told Thailand Medical News, "We don't want to scare people, we want to educate them. If you want to keep drinking raw milk, keep it in your refrigerator to minimize the risk of it developing bacteria with antibiotic-resistant genes."
The research findings were published in the journal Microbiome.
It is estimated that about 3 percent of the U.S. population consumes unpasteurized, or raw, milk, which has not been heated to kill pathogens and extend shelf life. In countries like India, the amount is almost 28 per cent. Raw milk is often touted to consumers as having an abundant supply of probiotics, or healthy bacteria, compared with pasteurized milk. However the researchers did not find that to be the case.
Dr Liu said, "Two things surprised us. We did not find large quantities of beneficial bacteria in the raw milk samples, and if you leave raw milk at room temperature, it creates dramatically more antimicrobial-resistant genes than pasteurized milk."
Importantly bacteria with antimicrobial-resistant genes, if passed to a pathogen, have the potential to become "superbugs," so that pharmaceuticals to treat infection or disease no longer work. Each year, almost 3 million people get an antibiotic-resistant infection, and more than 35,000 people die, according to the Centers for Disease Control.
The researchers analyzed more than 2,000 retail milk samples from five states, including raw milk and milk pasteurized in different ways. The study found raw milk had the highest prevalence of antibiotic-resistant microbes when left at room temperature.
Co-author Dr Michele Jay-Russell, research microbiologist and manager with the UC Davis Western Center for Food Safety said, "Our study shows that with any temperature abuse in raw milk, whether intentional or not, it can grow these bacteria with antimicrobial resistance genes. It's not just going to spoil. It's really high risk if not handled correctly."
Disturbingly, some consumers are intentionally letting raw milk sit outside of the refrigerator at room temperature to ferment, in order to make what's known as clabber. Co-author and Peter J. Shields Chair of Dairy Food Science Dr David Mills said if consumers eat raw milk clabber, they are likely adding a high number of antimicrobial-resistant genes to their gut.
Dr Mills added, "You could just be flooding your gastrointestinal tract with these genes. We do not live in an antibiotic-free world anymore. These genes are everywhere, and we need to do everything we can to stop that flow into our bodies."
Although more work is needed to fully understand whether antibiotic-resistant genes in raw milk translate into health risks for humans, Dr Mills suggests that consumers instead use a starter culture if they want to ferment raw milk, which carries specific strains of bacteria to inoculate the milk.
For more health tips, keep on logging to Thailand Medical News.


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