Helicobacter pylori standard value

At present, there are many methods to detect Helicobacter pylori, but the most common detection methods in clinical practice are carbon 13 and carbon 14 breath test. The normal value of carbon 14 is within 100, less than 100 is negative, and more than 100 is positive. The normal value of carbon 13 is 0 to 4, less than 4 indicates negative Helicobacter pylori infection, and more than 4 indicates positive Helicobacter pylori infection.