Chapter 25,part A Microbial Diseases of the Digestive System
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings B.E Pruitt & Jane J. Stein Chapter 25, part A Microbial Diseases of the Digestive System
Microbial Diseases of the Digestive System Transmitted in food and water Fecal-oral cycle can be broken by: Proper sewage disposal Disinfection of drinking water Proper food preparation and storage
Microbial Diseases of the Digestive System • Transmitted in food and water • Fecal-oral cycle can be broken by: • Proper sewage disposal • Disinfection of drinking water • Proper food preparation and storage
The Digestive System Oral cavity Tongue Parotid(salivary) Teeth- gland Pharynx Esophagus Liver Gallbladder Stomach Duodenum Pancreas. Small intestine Large intestine Rectum- Anus Figure 25.1
The Digestive System Figure 25.1
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
Dental Caries (a)S.mutans growing in glucose broth. (b)S.mutans growing in sucrose broth; 5μm SEM note the accumulations of dextran 54m Arrows point to S.mutans cells. Figure 25.3a,b
Dental Caries Figure 25.3a, b