So, how do you know you have bacteria in the back of your throat and it isn't going away? You can see it?
Hopefully not. Prednisone, by the way, is a steroid. It reduces the inflammation and selling and that's why they gave it to you. It's not an antibiotic that works on bacteria or anything. Take your current medication as directed. Why do they think you are getting so many sore throats that are not viral?