There's a bunch of new diseases in the latest rimworld alpha. Is it possible to cure gut worms?
Yes. There are two ways to do this.
Gut worms will eventually go away with repeated treatment. This is slow and takes a lot of medicine, but will work. Eventually.
Alternatively, you can amputate the colonist's stomach. This will remove the worms. A colonist can survive without a stomach, but they will eat extremely slowly as a result. This is probably a bad idea as you can't harvest or buy stomachs; replacing it is very difficult.