There's no reason to get a fever and chills unless there's a pathogen in the stool. I really question their screening process sometimes. My GI doctor and infectious disease specialist all used the most crappy stool testing methods to look for infections. Meanwhile the private labs in the USA found most of my previous infections.
If they are using the same testing methods in the FMT procedures that they do to look for infections in the public, then the FMTs are high risk.
There's also some other factor about FMT that can make it incompatible. I'm having trouble figuring out what that might be.
DX left-sided UC 2015, 3 fulminant flares since then
Started FMT clinical trial Feb 2018
Dx w/mycobacterium avium paratuberculosis (MAP) Sept 2017
Stopped AMAT @ 6 weeks due to intolerance of meds
Others: Entyvio every 4 weeks, Low Dose Naltrexone 3mg at bedtime, natural ferments
Current status: lingering rectal bleeding, otherwise healthy