Type B, or antral-predominant, gastritis is the more common form of chronic gastritis. H. pylori infection is the cause of this entity. Although described as "antral-predominant," this is likely a misnomer in view of studies documenting the progression of the inflammatory process toward the body and fundus of infected individuals.
The conversion to a pan-gastritis is time-dependent–estimated to require 15–20 years. This form of gastritis increases with age, being present in up to 100% of persons over age 70. Histology improves after H. pylori eradication. The number of H. pylori organisms decreases dramatically with progression to gastric atrophy, and the degree of inflammation correlates with the level of these organisms. Early on, with antral-predominant findings, the quantity of H. pylori is highest and a dense chronic inflammatory infiltrate of the lamina propria is noted, accompanied by epithelial cell infiltration with polymorphonuclear leukocytes.
Antral gastritis showed upper abdominal fullness, pain, or pain, Changcheng periodic seizures, can be accompanied by belching, acid reflux, vomiting, anorexia, weight loss, etc., chronic gastric inflammation also showed loss of appetite, persistent abdominal pain , hemorrhagic anemia.
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