| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Streptococcus Lancefield group A | Is a | False | Lancefield group streptococcus | Inferred relationship | Some |  | 
| Streptococcus Lancefield group B | Is a | False | Lancefield group streptococcus | Inferred relationship | Some |  | 
| Streptococcus Lancefield group I | Is a | True | Lancefield group streptococcus | Inferred relationship | Some |  | 
| Streptococcus Lancefield group J | Is a | True | Lancefield group streptococcus | Inferred relationship | Some |  | 
| Streptococcus Lancefield group U | Is a | True | Lancefield group streptococcus | Inferred relationship | Some |  | 
| Streptococcus Lancefield group V | Is a | True | Lancefield group streptococcus | Inferred relationship | Some |  | 
| Streptococcus Lancefield group W | Is a | True | Lancefield group streptococcus | Inferred relationship | Some |  | 
| Streptococcus Lancefield group X | Is a | True | Lancefield group streptococcus | Inferred relationship | Some |  | 
| Streptococcus Lancefield group Y (organism) | Is a | True | Lancefield group streptococcus | Inferred relationship | Some |  | 
| Streptococcus Lancefield group Z | Is a | True | Lancefield group streptococcus | Inferred relationship | Some |  | 
| Streptococcus, group M | Is a | True | Lancefield group streptococcus | Inferred relationship | Some |  | 
| Streptococcus, group K | Is a | True | Lancefield group streptococcus | Inferred relationship | Some |  | 
| Streptococcus, group H | Is a | True | Lancefield group streptococcus | Inferred relationship | Some |  | 
| Streptococcus, group E | Is a | True | Lancefield group streptococcus | Inferred relationship | Some |  | 
| Streptococcus, group R | Is a | True | Lancefield group streptococcus | Inferred relationship | Some |  | 
| Streptococcus, group P | Is a | True | Lancefield group streptococcus | Inferred relationship | Some |  | 
| Streptococcus, group Q | Is a | True | Lancefield group streptococcus | Inferred relationship | Some |  | 
| Streptococcus, group D | Is a | True | Lancefield group streptococcus | Inferred relationship | Some |  | 
| Streptococcus, group L | Is a | True | Lancefield group streptococcus | Inferred relationship | Some |  | 
| Streptococcus, group T | Is a | True | Lancefield group streptococcus | Inferred relationship | Some |  | 
| Streptococcus, group G | Is a | True | Lancefield group streptococcus | Inferred relationship | Some |  | 
| Streptococcus, group N | Is a | True | Lancefield group streptococcus | Inferred relationship | Some |  | 
| Streptococcus, group O | Is a | True | Lancefield group streptococcus | Inferred relationship | Some |  | 
| Streptococcus, group F | Is a | True | Lancefield group streptococcus | Inferred relationship | Some |  | 
| Streptococcus, group C | Is a | True | Lancefield group streptococcus | Inferred relationship | Some |  | 
| Streptococcus, group S | Is a | True | Lancefield group streptococcus | Inferred relationship | Some |  | 
| Beta-hemolytic Streptococcus, group A (organism) | Is a | True | Lancefield group streptococcus | Inferred relationship | Some |  | 
| Beta-hemolytic Streptococcus, group B | Is a | False | Lancefield group streptococcus | Inferred relationship | Some |  | 
| Streptococcus species, not group A and not group B and not group D (organism) | Is a | True | Lancefield group streptococcus | Inferred relationship | Some |  |