Beta-haemolytic streptococci species are further separated into Lancefi eld groups (after Rebecca Lancefield, the American microbiologist who developed this classifi cation system in the 1930s)
Beta-haemolytic streptococci species are further separated into Lancefi eld groups (after Rebecca Lancefield, the American microbiologist who developed this classifi cation system in the 1930s)