Drug-resistant bacteria are thwarting the world’s last-resort antibiotics, leading scientists to seek new compounds from poisonous frogs, backyard soil bacteria, and other wildlife. Now, scientists have found the makings of an exceptional microbe killer inside us: By tweaking a naturally occurring peptide—a short chain of amino acids—found in the human body, researchers have designed a drug that could wipe out obstinate microbes resistant to all available treatments.

Read more…  Sciencemag