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What bacteria did Marshall and Warren discover causes most stomach ulcers?
H. pylori
True or False: Stress is the main cause of peptic ulcers.
False
Which scientist drank the bacteria to prove his hypothesis?
Barry Marshall
Where in the body does H. pylori live?
The stomach
What shape is H. pylori?
Spiral-shaped
Who was Marshall’s scientific partner?
Robin Warren
What did Marshall develop after drinking the bacteria?
Gastritis symptoms / stomach inflammation
Why didn’t scientists believe their idea at first?
They thought stomach acid killed all bacteria
What treatment did Marshall & Warren prove works for ulcers?
Antibiotics
Which part of the digestive system is affected in a gastric ulcer?
The stomach
Name one method Marshall & Warren used to identify H. pylori.
Biopsy, staining, or culture
In what year did Marshall and Warren win the Nobel Prize?
2005
What key scientific idea did their work challenge?
That ulcers were caused by stress and lifestyle, not bacteria
Why was it difficult to grow H. pylori at first?
It grew very slowly / needed the right conditions
What scientific principle did Marshall demonstrate by infecting himself?
Self-experimentation / proving causation
