antirickettsial agent

例句：

1. 1.The new vaccine is an antirickettsial agent that can prevent the disease.
   这种新疫苗是一种抗立克次氏体药物，可以预防这种疾病。
2. 2. The researcher discovered a new antirickettsial agent that could be used to treat leishmaniasis.
   研究人员发现了一种新的抗立克次氏体药物，可以用来治疗利什曼病。
3. 3. The drug was tested on animals and found to be effective against antirickettsial agents.
   该药物在动物身上进行了测试，并发现对抗立克次氏体药物有效。