What bacterium did Marshall and Warren study?
Helicobacter pylori
Escherichia coli
Staphylococcus aureus
Salmonella enterica
Answer
Helicobacter pylori, the bacterium studied by Marshall and Warren, is a spiral-shaped bacterium that infects the stomach. It was previously believed that the stomach was too acidic for bacteria to survive, but Marshall and Warren's research showed that H. pylori can survive in the stomach's acidic environment by burrowing into the stomach lining.
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