摘要
Elie Metchnikoff’s lecture illustrated that‘men were free from microbes at birth and within tenth and seventeenth hour of birth the surface of skin,mucous membranes,respiratory passages,and more abundantly the digestive organs became peopled with microbes derived from the air or water’.1 It is interesting to note that the revised ratio of human cells to the number of bacteria in the body is 1:1,which is further tipped towards the human cell mass following each defecation.
