How do newborns acquire the necessary gut symbiont?

Newborns acquire gut symbionts primarily during birth, as they are exposed to their mother's microbiota through the birth canal. Additionally, breastfeeding plays a crucial role, as breast milk contains prebiotics and beneficial bacteria that help establish a healthy gut microbiome. Environmental factors, such as contact with caregivers and surroundings, also contribute to the introduction of various symbiotic microbes during the early stages of life. This initial colonization is vital for the development of the immune system and overall health.