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The Guardian - UK
The Guardian - UK
National
Amelia Tait

Medieval medicine: the return to maggots and leeches to treat ailments

Illustration of a hand (the arm in a white sleeve) reaching into an old-fashioned sage green medicine cabinet with bottles of different shapes and sizes on three shelves
‘Between 2007 and 2019, the number of NHS patients treated with maggots increased by 47%. Meanwhile, a farm in Wales supplies 60,000 leeches every year.’ Illustration: Barry Falls

For several long months in the 1990s, Ronald Sherman travelled all over southern California catching flies. As a qualified doctor pursuing an infectious diseases fellowship, Sherman was curious about a potential new – and also very old – way to clean wounds. At medical school, he’d written a paper on the history of maggot therapy, tracing how the creepy crawlies helped heal soldiers in the Napoleonic wars, the American civil war and the First World War. Now Sherman wanted to test maggots in a modern setting. The problem? No one farmed and sold the species of flies that the doctor needed – so he went out and caught them himself.

Once the specimens were collected and “as soon as everyone stopped laughing”, Sherman got to work. After treating his first patients with maggots, he was impressed by the results, but nonetheless he struggled to get his initial research papers published. A rejection letter from one journal read: “Publishing the manuscript might be interpreted as an endorsement for a therapy that is ancient.” Yet today, Sherman says, “that same journal probably has two or three articles about maggot therapy every year!”

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