View source for Β-hemolytic streptococci

==Background==

===Microbiology===

*Grouping of [[Stain::Gram-positive]] [[Shape::coccus|cocci]]
*Species of clinical interest mostly defined by Lancefield grouping
**Group A: [[Streptococcus pyogenes]]
**Group B: [[Streptococcus agalactiae]]
**Non-Lancefield: [[Streptococcus iniae]]
**Miscellaneous: [[Streptococcus anginosus group]] are sometimes β-hemolytic

===Identification===
{| class="wikitable"
!Lancefield
!Bac
!PYR
!Cam
!VP
!Hip
!Arg
!Esc
!Str
!Sbl
!Tre
!Rib
!Species
|-
|A
| +
| +
|–
|–
|–
| +
|v
|–
|–
|
|–
|[[Streptococcus pyogenes]]
|-
|B
|–
|–
| +
|–
| +
| +
|–
|–
|–
|
|
|[[Streptococcus agalactiae]]
|-
|C
|–
|–
|–
|–
|–
| +
|v
|–
|v
| +
| +
|[[Streptococcus dysgalactiae]] subsp. ''dysgalactiae''
|-
|A,C,G,L
|–
|–
|–
|–
|–
| +
| +
|–
|–
| +
| +
|[[Streptococcus dysgalactiae]] subsp. ''equisimilis''
|-
|C
|–
|–
|–
|–
|–
| +
|v
| +
|–
|–
|
|[[Streptococcus equi]] subsp. ''equi''
|-
|C
|–
|–
|–
|–
|–
| +
|v
| +
| +
|
|
|[[Streptococcus equi]] subsp. ''zooepidemicus''
|-
|G
|–
|–
|<nowiki>+</nowiki>
|–
|–
|<nowiki>+</nowiki>
|<nowiki>+</nowiki>
|–
|–
|v
|
|[[Streptococcus canis]]
|-
|A, C, G, F, none
|–
|–
|–
| +
|–
| +
| +
|–
|–
| +
|
|[[Streptococcus anginosus group]]
|-
|C
|–
|–
|–
| +
|–
| +
| +
|–
|–
| +
|
|[[Streptococcus constellatus]] subsp. ''pharyngitis''
|-
|E, P, U, V, none
|–
| +
| +
| +
|v
| +
| +
|–
| +
| +
|
|[[Streptococcus porcinus]]
|-
|none
|–
| +
| +
|–
|–
|–
| +
| +
|–
|
|
|[[Streptococcus iniae]]
|-
|C, F
| +
|–
|–
|–
|–
|–
|–
|–
|–
|
|
|[[Streptococcus phocae]]
|-
|none
|–
|–
|–
|–
|–
| +
|–
|–
|–
| +
|
|[[Streptococcus didelphis]]
|}

== Further Reading ==

* What Happened to the Streptococci: Overview of Taxonomic and Nomenclature Changes. ''Clin Microbiol Rev''. 2002;15(4):613-630. doi: [[doi:10.1128/CMR.15.4.613-630.2002|10.1128/CMR.15.4.613-630.2002]]
{{DISPLAYTITLE:β-hemolytic streptococci}}
[[Category:Gram-positive cocci]]