The benefits of good bacteria include keeping the digestive system healthy according to WebMD. Also known as probiotics, these bacteria reduce the growth of harmful bacteria in the digestive tract.
Good bacteria, or probiotics, may help with conditions such as irritable bowel syndrome, digestive tract infections and some cases of diarrhea. If the presence of good bacteria decreases due to taking antibiotics, yeast can build up and lead to conditions such as urinary tract infections and digestive illnesses.
Although there are over 400 types of good bacteria in the digestive tract, taking antibiotics over a prolonged period can kill them and lead to an imbalance in the digestive tract. Certain probiotics, such as lactobacillus acidophilus, which is found in some yogurts, can replenish the good bacteria and restore balance to the digestive tract.