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Ammonia breath

Smelly breath – 12Healthy.com

This is an important feature of H. pylori infection. Patients develop a characteristic breath because the bacteria produces an enzyme called urease. This enzyme converts urea into ammonia. This can be detected through halitosis (smelly breath), because ammonia is present and can be detected in the breath.This feature is one of the important diagnostic criteria, and it can be tested by urea breath tests to confirm H. pylori infection.