| BFG | Bacteroides fragilis group |
| CDI | Clostridioides difficile infections |
| EMA | The European Medicines Agency |
| FDA | The U.S. Food and Drug Administration |
| MDR | Multidrug resistance |
| MIC | Minimal inhibitory concentration |
| PFOR | Pyruvate ferredoxin oxidoreductase |
| SCR | Sustained clinical response |