True about colonic organisms is -

• At birth, the intestine is sterile, but organisms are soon introduced with food. • In the breastfed children, the organisms present in the intestine: Lactic acid streptococci and Lactobacilli. • In normal adults, the stomach acidity keeps the number of microorganism at minimum, unless obstruction at the pylorus favors the proliferation of gram positive cocci and bacilli. • As the pH of intestinal contents becomes alkaline, the resident flora gradually increases. • In diarrhea, bacterial count decreases, whereas count increases in intestinal obstruction.