Normal Microbiota 。>300 species in mouth Large numbers in large intestine,including: Bacteroides 。E.coli ·Enterobacter 。Klebsiella ·Lactobacillus 。Proteus • >300 species in mouth • Large numbers in large intestine, including: • Bacteroides • E. coli • Enterobacter • Klebsiella • Lactobacillus • Proteus Normal Microbiota