You are doing the right thing to keep him calm and crated. If there is an emergency because he opened the wound, it gets much worse. I kept a kitten with a URI whom I rescued years ago during the summer in a large dog crate, all set up for her and safely locked, for several weeks as it was persistent. Like Yoda, her other options in life were pretty grim; keep reminding yourself of that.
The tapeworm can be easily dealt with but, I know, one more thing.
The tapeworm can be easily dealt with but, I know, one more thing.