| | Gastro-Related Diseases | Control Group | Changes in Gastric Microorganisms | Reference | | Atrophic Gastritis | Healthy Subjects | Streptococcus↓, Prevotella↓ | Engstrand L, et al. [79] | | Gastric Cancer | Normal Mucosa | Microorganisms↑, Anaerobic Bacteria (eg Clostridium and Bacteroides species)↑ | Dicksved J, et al. [80] | | Chronic Gastritis | Normal Control Group | Prevotella↑, Streptococcus↑, Neisseria↑, Porphyromonas↑, Haemophilus↑ | Nardone G, et al. [81] | | H. Pylori-Infected Gastritis | H. Pylori-Negative Individuals | Proteobacteria↓, Firmicutes↑ | Li XX, et al. [82] | | Atrophic Gastritis | Healthy Controls | Streptococcus↑, Prevotella↓ | Ozbey G, et al. [83] | | H. Pylori-Infected Antral Gastritis | Without H. Pylori Infection | Proteobacteria↓, Prevotella↓, Firmicutes↑, Streptococcus↑ | Liu J, et al. [84] | | H. Pylori-Infected Peptic Ulcer | / | Streptococcus↑, Neisseria↑, Rothia↑, Staphylococcus↑ | Bilello J, et al. [78] | | Invasive Gastric Cancer | Without Cancer | Porphyromonas↓, Neisseria↓, Streptococcus Sinensis↓, Lactobacillus Coleohomonis ↑, Lachnospiraceae↑, Pseudomonas↑ | Zhang S, et al. [85] | | Gastric Cancer | / | Nitrate-reducing bacterial species reducing nitrate (including Neisseria, Clostridium, Staphylococcus, and Clostridium Colicanis)↑ | Hsieh YY, et al. [86] | | Gastric Cardia Adenocarcinoma | / | Firmicutes, Bacteroidetes and Proteobacteria at the phylum level | Shao D, et al. [87] | | Gastric Cancer | Chronic Gastritis | Achromobacter↑, Citrobacter↑, Phyllobacterium↑, Clostridium↑, Rhodococcus↑, Lactobacillus↑ | Ferreira RM, et al. [88] | | Gastric Cancer | Non-Tumor Tissues | Prevotella↑, Streptococcus↑, Veillonella↑, Haemophilus↑, Neisseria↑ | Shao D, et al. [87] |
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