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But scientists noticed hints that faecal transplants for C. difficile also seemed to get rid of superbugs.

FMT has a 90% cure rate for C. difficile infection.

"We found reduced vancomycin susceptibility in C. difficile was associated with lower 30-day sustained clinical response and lower 14-day initial cure rates in the studied patient cohort," said Gonzales-Luna.

The fight against C diff takes its toll internally, including a significant disruption of gut microbiota, usually by broad-spectrum antibiotics, leading to loss of colonization resistance to C difficile.

Recurrent C. difficile infections occur after suppressive antibiotic treatments that knock out almost all of the normal gut flora.