Koch's postulates
- The microorganism must be found in abundance in all organisms suffering from the disease but should not be found in healthy organisms.
这种微生物必须在所有患有这种疾病的生物体中大量存在，但不应在健康的生物体中发现。
- The microorganism must be isolated from a diseased organism and grown in pure culture
微生物必须从患病生物体中分离出来，并作为纯培养物中生长。
- The cultured microorganism should cause disease when introduced into a healthy organism.
当培养的微生物被引入健康的生物体时，应该会引起疾病。
- The microorganism must be re-isolated from the inoculated, diseased experimental host and identified as being identical to the original specific causative agent.
必须从接种的患病实验宿主中重新分离微生物，并鉴定为与原始特异性病原体相同。