typhobacterin

例句：

1. 1. This antibiotic is effective against many types of bacteria.
   这种抗生素对许多类型的细菌都有效。
2. 2. The patient was given antibiotics to treat his bacterial infection.
   病人被给予抗生素来治疗他的细菌感染。
3. 3. Antibiotics are often used as prophylactics before surgery to prevent infections.
   在手术前，抗生素常被用作预防感染的措施。