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Goats' milk with antimicrobial lysozyme speeds recovery from diarrhea
Date:3/13/2013

Milk from goats that were genetically modified to produce higher levels of a human antimicrobial protein has proved effective in treating diarrhea in young pigs, demonstrating the potential for food products from transgenic animals to one day also benefit human health, report researchers at the University of California, Davis.

The study is the first on record to show that goats' milk carrying elevated levels of the antimicrobial lysozyme, a protein found in human breast milk, can successfully treat diarrhea caused by bacterial infection in the gastrointestinal tract.

The findings, slated to appear March 13 in the online scientific journal PLOS ONE, offer hope that such milk may eventually help prevent human diarrheal diseases that each year claim the lives of 1.8 million children around the world and impair the physical and mental development of millions more.

"Many developing parts of the world rely on livestock as a main source of food," said James Murray, a UC Davis animal science professor and lead researcher on the study. "These results provide just one example that, through genetic engineering, we can provide agriculturally relevant animals with novel traits targeted at solving some of the health-related problems facing these developing communities."

In this study, Murray and colleagues fed young pigs milk from goats that were genetically modified to produce in their milk higher levels of lysozyme, a protein that naturally occurs in the tears, saliva and milk of all mammals.

Although lysozyme is produced at very high levels in human breast milk, the milk of goats and cows contains very little lysozyme, prompting the effort to boost lysozyme levels in the milk of those animals using genetic modification.

Because lysozyme limits the growth of some bacteria that cause intestinal infections and diarrhea and also encourages the growth of other beneficial intestinal bacteria, it is considered to be on
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Contact: Patricia Bailey
pjbailey@ucdavis.edu
530-752-9843
University of California - Davis
Source:Eurekalert

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