MICROBIAL DISEASES OF THE GASTROINTESTINAL TRACT

1.BACTERIAL

-Chronic gastritis and peptic ulcer caused by helicobacter pylori

-Noninvasive bacterial gastroenteritis

causes:clostridium perfringens
enterotoxigenic escherichia coli
bacillus cereus
clostridium difficile
vibrio cholerae

-Invasive bacterial gastroenteritis
causes:salmonella
shigellaspecies
campylobacter and acrobacter
enterohemorrhagic
listeria monocytogenes
vibrio parahaemolyticus
yersinia anterocolitica
aeromonas

d) Ingestion of preformed bacterial toxins presenting with gastronitestinal tract symptoms with vomiting as primary symptom; diarrhoea may alse be present

e) Ingestion of preformed nacterial toxins presenting with neurological manifestations

f) Intestinal infection presenting with systemic illnesses

2.VIRAL GASTROENTERITIS
-viral gastroenteritis
rotavirus
norwalk virus
astroviruses
adenovirus

-viral infection of salivary glands and pancreas by:
Mumps virus
Human Herpes Virus 7


3.FUNGAL DISEASES
-ergot posioning
-mushroom poisoning
-aflatoxin poisoning ( aspergillus flavus mycotoxin)
-candidiasis