It was supposed to be a drug of last resort. Colistin, an antibiotic rarely used due to its high toxicity to humans, sat on shelves for years. But when a vicious strain of pathogens, resistant to most, if not all, other antibiotics, began making their way across the globe, infecting pigs from South America to Asia, Colistin had its moment. And it was a big moment. In China, pork producers began adding copious amounts of the cheap drug to pig feed. It wasn`t long, though, before the pathogens developed a resistance to the drug of last resort. That resistance was...
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