Microbiology Groups

Question 1

What are the 3 groups of Streptococcal bacteria?

Answer 1

1. Alpha haemolytic (partial haemolysis)

• Streptococcus pneumonia
• Viridans

2. Beta haemolytic (complete haemolysis)

• Pyogenes : Lancfield Group A
• Agalactiae: Lancfield Group B

3. Gamma haemolytic (no haemolysis)
   * Enterococcus (formerly group D streptoccus) e.g. faecalis