Leishmania infantum

例句：

1. 1. This disease is caused by the Leishmania infantum parasite.
   这种病是由利什曼原虫引起的。
2. 2.The researcher focused on the Leishmania infantum bacterium.
   研究者专注于利什曼原虫细菌。
3. 3.Treatments for this disease often involve administering anti-Leishmania drugs.
   治疗这种病通常需要使用抗利什曼原虫药物。