文档介绍：Chapter 25, part B
Microbial Diseases of the Digestive System
Occurs as traveler's diarrhea and epidemic diarrhea in nurseries
50% of feedlot cattle may have enterohemorrhagic strains in their intestines
Enterohemorrhagic strains such as E. coli O157:H7 produce Shiga toxin
O = cell wall antigen
H = flagellar antigen
Escherichia coli Gastroenteritis
Campylobacter jejuni
Usually transmitted in cow's milk
Campylobacter Gastroenteritis
Helicobacter Peptic ulcer disease
Treated with antibiotics
H. pylori causes stomach cancer
Figure
Helicobacter Peptic ulcer disease
Figure
Y. enterocolitica and Y. pseudotuberculosis
Can reproduce at 4°C
Usually transmitted in meat and milk
Yersinia Gastroenteritis
Grow in intestinal tract producing exotoxin
Clostridium perfringens Gastroenteritis
Ingestion of bacterial exotoxin produces mild symptoms
Bacillus cereus Gastroenteritis
Mumps
Figure
Mumps virus
Enters through respiratory tract
Infects parotid glands
Prevented with MMR ine
Inflammation of the liver
Hepatitis may result from drug or chemical toxicity, EB virus, CMV, or the Hepatitis viruses
Hepatitis