BIOL 2053 Lecture 18: Delta and Epsilon Protobacteria, part 1Premium
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15th October 298
DELTA a EPSILON PROTEOBACTERIA
↳gram f- ve )bacteria in extreme environments
.2million cases of food poisoning each year in USA
.passed by chicken ,turkey ,pigs
.humans get it by contaminated meat awater
.invades small intestinal epithelium →produces exo toxins
.SYMPTOMS : diarrhoea ,high fever ,severe intestinal inflammation ,
.RECOVERY :5-8 days w/o antibiotics
.PREVENTION :wash hands ,prevent transmission
eat at clean places
GASTRITIS (and peptic ulcer disease )
-Adheres to mucus -producing cells in gastric system
by fim bride
.toxins ainflammatory response leads to gastric ulcers
.chronic gastritis →den of gastric cancers
.tt pylori produces urease which converts urea to Hao
to NH3 and coat creates basic enough environment in
the stomach to survive C4-6PH).
.RECOVERY :patient ingests He radioactive urea .If Hpylori is present ,14 aexhaled .
.TREATMENT Antibiotics achieve permanent cures .
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