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Lecture 18

BIOL 2053 Lecture 18: Delta and Epsilon Protobacteria, part 1Premium

2 pages16 viewsFall 2018

Department
Biology
Course Code
BIOL 2053
Professor
Todd Smith
Lecture
18

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15th October 298
DELTA a EPSILON PROTEOBACTERIA
gram f- ve )bacteria in extreme environments
SALMONELLA
Campylobacter jejuni
.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 ,
bloody stools
.RECOVERY :5-8 days w/o antibiotics
.PREVENTION :wash hands ,prevent transmission
,
eat at clean places
GASTRITIS (and peptic ulcer disease )
Helicobacter pylori
.Person-to-person contact
-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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