Which of the following microorganisms causes peptic ulcers?

Staphylococcus aureus

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Streptococcus pneumonia

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Helicobacter pylori

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Neisseria

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Solution

The correct option is C Helicobacter pylori
Helicobacter pylori are Gram-negative bacterium that live in the stomach of humans. This bacteria causes ulcers in the cells of the stomach and intestinal tract. The ulcers formed in the stomach are called peptic ulcers. Thus the correct answer is option C.

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