Laboratory of Bacterial Pathogenesis and Immunology

The Lancefield Collection of Streptococcus Strains

Streptococcus Group Reference Strains

• Group A: J17A4
• Group A Variant: A486 (Var.; no M)
• Group B: O90R (1963; for Group B serum)
  • type Ia: O90/14
  • type Ib: H36B/60/2
  • type Ic: A909/14
  • type II: V8; 18RS21/67/2
  • type III: D136C
• Group C: C74; K64/0/14
• Group D: D76; C1; C3
• Group E: K129; K131
• Group F: A575; F68A
• Group G: D166B; F68A
• Group H: F90A; K208
• Group L: D167A; D167B
• Group M: D168A ("X")
• Group N: C559; B209
• Group O: B357; B361