Barry Marshall and His Collaborators Showed That

question 47

Multiple Choice

Barry Marshall and his collaborators showed that

• A)Helicobacter pylori bacteria are protective against peptic ulcers.
• B)Helicobacter pylori bacteria cause chronic gastritis and stomach ulcers.
• C)lab animals are easily infected by Helicobacter pylori.
• D)lifestyle factors such as stress,diet,and smoking cause chronic gastritis and stomach ulcers.

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