Among other things. Just listening to an Australian doctor of clinical immunology, and he says there is some interesting work on inflammatory colitis that focuses on a persistent bacterial infection in the gut being the cause, and treatment w/ a series of antibiotics.

it's an intersting model, he says the current approach is to reduce the inflammation, but if the bacteria are the cause, focusing on inflammation is not very useful long term

nothing definitive; just being investigated at this point.