How bad is a colon infection?

Hi all! So yesterday my mom was taken to the hospital for a colon infection and I was told today that she won’t be able to leave until Friday :/ I’m pretty scared and there are a few things I’d like to know though. First is how serious is a colon infection? One main reason why I’m scared is that I have no idea how dangerous a colon infection is. Another thing I would like to know is can it get any worse? My mom told me that she feels a little better than yesterday but she’s still in pain (both from her infection and from her sinus headaches >_<). I also read that in some cases a colon infection can turn into colon cancer. This thought scares me more than anything. I really hope that it doesn’t get any worse so that she can come home soon. 🙁