Can you name some beneficial bacteria naturally found in the human body, or positive ways bacteria work in the body? Thanks. ~

no cause i dont think theres anything positive about bacteria

I wouldn't know the names of the actual bacteria, but there are many bacteria present in the small intestines, the "gut flora" that assist in absorption of nutrients (as well as their synthesis) and metabolism. Without them people would have various digestive issues and autoimmune problems. 

We wouldn't digest food and eliminate waste without all of those busy little bacterial moochers.