Dr. Mark Cook, an animal science professor at the University of  Wisconsin-Madison, has discovered an antibiotic alternative for certain infections common in livestock. Credit: University of Wisconsin-Madison.

Dr. Mark Cook, an animal science professor at the University of Wisconsin-Madison, has discovered an antibiotic alternative for certain infections common in livestock.
Credit: University of Wisconsin-Madison.

Many scientific breakthroughs, including the discovery of penicillin by Alexander Fleming, have occurred by happenstance. This is also true of a new technology that could one day replace the use of antibiotics in livestock, and perhaps even humans, for a variety of pathogenic digestive tract infections.

“We were trying to make animals more sensitive to disease so that we could find a replacement for antibiotics,” says Dr. Mark Cook, a professor of animal science at the University of Wisconsin-Madison. “We had [the answer] in our hands the whole time.”

The answer turns out to be Interleukin 10 (IL-10), a protein that is a kind of “off switch” for the immune system that can be […]

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