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Streptococci

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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Streptococci are Gram-positive cocci which form chains.

Classification:

  • by degree of haemolysis - alpha, beta, non-haemolytic
  • by Lancefield grouping

Beta haemolytic types show the most haemolysis. They include Streptococcus pyogenes which is Lancefield group A.

Alpha haemolytic types include viridans Streptococci and Streptococcus pneumoniae.


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