Multiple choice

By using which one of the following Lancefield grouping of streptococci is done?

  1. M protein

  2. Group C peptidoglycan cell wall

  3. Group C carbohydrate antigen

  4. None of these

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Lancefield classification is based on the C carbohydrate antigen in the bacterial cell wall. M protein is used for typing within Group A, not for the grouping itself.