beta hemolytic streptococcus

例句：

1. 1. This strain of bacteria is known to cause serious infections in humans.
   这种细菌已知会导致人类严重的感染。
2. 2. The patient was treated with antibiotics for the infection caused by the beta hemolytic streptococcus.
   患者因β溶血性链球菌引起的感染接受了抗生素治疗。
3. 3.The research focused on the genetic differences between different strains of the beta hemolytic streptococcus.
   研究专注于不同株系β溶血性链球菌的遗传差异。