The non-human microscopic population includes bacteria, fungi, viruses and protozoa. Bacteria and fungi are the ones of which there are good and bad. Some are incredibly helpful. They help us digest parts of the food we otherwise wouldn’t be able to process any further. Among viruses and protozoa, however, there are no good ones. There are only those causing a variety of terrible symptoms and others that are just benign and do us no harm — at least to the best of our current knowledge.
Regardless, most of those microbes, both good and bad, colonize our digestive systems, living primarily within intestines where they all vie for control. It is extremely important to know that antibiotics are powerful drugs could only treat bacterial infections and taking them in case of viral infections like cold, flu or diarrhea could cost your body a significant amount of good bacteria. One good way to restore a good intestinal ecosystem is to take probiotic supplements. A majority of our microbiome live in the large intestine, or colon. For the good bacteria among them to thrive, they need to have some of our food intake reach this part of the body undigested.
Medical doctors around the world are warming to the idea of fecal microbiota transplantation (FMT). The procedure basically consists of injecting a healthy individual’s stool into a sick person’s colon. The goal here is to help stop the spread of bad microbes and overthrow their monopoly on who calls the shots down the patient’s bowels.