Tests reported in the journal Nature found the resulting drug, lugdunin, could treat superbug infections.
The researchers, at the University of Tubingen in Germany, say the human body is an untapped source of new drugs.
The last new class of the drugs to reach patients was discovered in the 1980s.
Nearly all antibiotics were discovered in soil bacteria, but the University of Tubingen research team turned to the human body.
Dreaded superbug
