Final answer:
Newborns and adults have different sets of normal flora in their mouths. The initial colonization in newborns is influenced by factors such as mode of delivery and feeding regime.
Step-by-step explanation:
In newborns, the mouth contains a different set of normal flora compared to adults. Newborns and adults have different sets of normal flora in their mouths. The initial colonization in newborns is influenced by factors such as mode of delivery and feeding regime.
The first consumption of breast milk or formula introduces beneficial bacteria into the newborn's gastrointestinal tract, establishing the bacterial flora. The initial colonization in newborns is influenced by factors such as mode of delivery and feeding regime. This colonization continues to evolve throughout life, with the gut microbiome reaching a relatively stable state by the age of 2 to 3 years.