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The telling quote from the entire article on how the antibacterial of last resort is now ineffective:

"The bulk of the 12,000 tonnes of colistin fed to livestock yearly around the world is used in China, say Liu and colleagues, which would favour the evolution of mcr-1."

Average human weight? 80 kg. High end dose for a human per day? 5 mg/kg. Let's make all humans fat to add to the weight. 100 kg. So half a gram per human per day. Does this mean we used 24 billion grams per year on livestock?? ~65 million grams per day???

This means the livestock industry is using 131.5 million people days of the antibiotic each day.

And you say the bacteria are now resistant to it? Who'd could've possibly predicted that?