Bacterial flagellum is the organ of bacterial movement, Helicobacter pylori is able to pass through the mucus layer on the gastric epithelial cells from the strongly acidic gastric lumen to reach the neutral environment of the gastric epithelial cells, which is a good example of the role of flagellar movement, through flagellar staining you can observe the flagellar morphology, the number of flagellum and flagellum in the distribution of the location of the bacteria, the flagellum number and distribution of the location of the flagellum in the bacteria is one of the most important bases of identification of bacteria.

Flagellar staining solution (silver staining method) using silver-plated staining method, the advantages of this staining method is the use of ammonia silver staining solution as the core dye, the reagent is more sensitive, the operation is simple, and the result is judged to be more reliable.