The results of Wright-Giemsa staining for each Helicobacter pylori density. (left upper) H. pylori -, H. pylori was not found on the special stain; (right upper) H. pylori 1+, occasionally or less than 1/3 of the total length of the specimen, a small number of H. pylori; (left lower) H. pylori 2+, the distribution of H. pylori is more than 1/3 of the whole sample, but less than 2/3, or continuous, thin and sparse, exists in the full length of the sample; (right lower) H. pylori 3+, H. pylori was distributed in heaps throughout the whole length of the specimen.
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