Table 2. Non-Helicobacter pylori microbiota and prognosis of gastric cancer.
| Indicator | Sample source | Sequencing method | Outcome | Reference |
| GemmigerBacteroidesLachnospiraceae | Stool | 16S rRNA | Liver metastasis | 29 |
| CollinsellaBlautiaAnaerostipesDoreaLachnospiraceae | Stool | 16S rRNA | Advanced stage | 96 |
| BlautiaRuminococcusOscillospira | Stool | 16S rRNA | Ki67 status | 97 |
| PrevotellaEubacteriumDesulfovibiroLachnospira | HER2 status | |||
| Firmicutes | Lymph node metastasis | |||
| Methylobacterium | Tumour tissue | 16S rRNA | Overall survivalRecurrence-free survival | 18 |
| MethylobacteriumOceanobacterSyntrophomonas | Vessel carcinoma emboli | |||
| Solicoccozyma | Tumour tissue | ITS rDNA | Advanced stage | 54 |
| Nerve invasion | ||||
| CitrobacterEnterobacterDoreaGordonibacter | Stool | 16S rRNA | Progression-free survival among patients with chemotherapy | 107 |
| LactobacillusErysipelotrichaceae | Progression-free survival among patients with immunotherapy | |||
| StreptococcusFlavonifractor | Progression-free survival among patients with chemotherapy and immunotherapy | |||
| PrevotellaFusobacterium | Tumour tissue | 16S rRNA | Overall survival | 94 |
| Lactobacillus gasseri | Stool | 16S rRNA | Overall survival and progression-free survival among patients with immunotherapy | 108 |
| HalomonasShewanella | Tumour tissue | 16S rRNA | Overall survival | 95 |
ITS, internal transcribed spacer