Fecal Transplantation to Eradicate Colonizing Emergent Superbugs

Donated fecal matter will be sequentially diluted in 80% glycerol used as bacterial cryoprotectant, blenderized, sieved and centrifuged (4°C, 4000 tr/min, 20 min). The pellet is resuspended and manually pipetted into size 0 capsules (650 μL), which are closed and then secondarily sealed in size 00 capsules (hypromellose capsules, DR caps from Capsugel®, MA). Each capsule contains 1g ± 0,1g of fecal suspension corresponding to 0.5 to 0.8g of native stool. Capsules will be stored frozen at -80°C for up to 24 months pending use. The stability of biodiversity and viability of the frozen microbiota was regularly verified to ensure the efficacy of the transplantation (personal data).

"The placebo FMT capsules will be performed with the final dilution solution, ie the 80% glycerol solution used as a cryoprotectant. This solution will be double encapsulated like the FMT capsules."