T. rex Doesn't Have a Septic Bite?

It is commonly accepted that the bite of a T. rex, along with its crushing force, contains bacteria that is like that of a Komodo Dragon and is poisonous. Well, I think not. Most of you have said that there are healed bite marks of T. rex on some herbivores, and even a tooth has been found lodged in the tail of an Edmontosaurus, and the area around the tooth was healed. It is believed that any animal infected with a septic bite will die in a week, but it takes more than a week to heal bone, several weeks to months to heal bones. The animal wouldn't have the time to heal completely before the bite came into effect, and would die before healing, but that wasn't the case. This tells me one of the following: that the bite of a T. rex isn't septic, that it is septic, but dinosaurs are immune to it, that dinosaurs aren't immune to it, but it will take a long time to take into effect, or that the bacteria back then is different than it is now, and therefore doesn't do any harm. I'd like to hear your opinion on the subject, and my dinosaur story should be up shortly.