Barry Marshall
1951
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Biography
Barry Marshall is an Australian physician and Nobel laureate known for his groundbreaking work on the discovery of Helicobacter pylori as the cause of gastritis and peptic ulcers. Born in 1951 in Perth, Australia, Marshall's research challenged prevailing medical beliefs, leading to a shift in how these common conditions were diagnosed and treated. His dedication to investigating the bacterial theory of ulcers, initially criticized but later widely accepted, revolutionized the field of gastroenterology.