I doubt there is a concrete answer. Many bacteria produce amyloids as a normal part of their body. Amyloids are just one specific type of protein fold stacking

I doubt there is a concrete answer. Many bacteria produce amyloids as a normal part of their body. Amyloids are just one specific type of protein fold stacking on each other, and it is so, so common. Same thing with SCFAs, they are normally part of the metabolic cycle of many bacteria. Tracking down one of them is nearly impossible from something as complex as the gut microbiome.