A sufficient amount of beneficial bacteria is essential for the well-being of the human body. They take part in the digestion (playing a key role in the formation and absorption of some substances), regulate our immune system, have hormone-regulating capabilities and suppressall the other harmful bacteria.
Different bacteria live in different parts of the gastrointestinal tract. Also, the proportions and types of benign bacteria are unique for each person and are believed to be passed down from mother to child when the child starts drinking breast milk. This is one of many reasons why breastfeeding the child is essential for the child’s health.
Benign bacteria that live in the mucous layer of the large intestine are usually represented by Spirochetes and Fusobacteria, while the lumen (the space within a hollow organ) of the large intestine predominantly contains Bifidobacteria, Bacteroides, and Eubacteria. Yeasts and Lactobacilli usually reside in the lumen of the stomach and duodenum.
In essence, dysbiosis (otherwise known as dysbacteriosis) is a condition during which the normal bacterial flora of the gastrointestinal tract is altered.