来自《耶鲁大学开放课程：1600年后西方社会的流行病 第14集 第14集》

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  not only for silkworms,but for human beings as well.
  不仅限于蚕 也可用于人类
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  He isolated then two germs affecting silkworms,
  接着他提取了两种使蚕致病的病菌
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  and demonstrated that they were responsible
  验证了这两种细菌引发
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  for specific contagious diseases.
  特定传染性疾病的能力
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  Pasteur isolated a germ
  巴斯德提取了一种细菌
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  and convincingly linked it with a specific disease,
  十分可信地将之与一种特定疾病联系起来
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  and the concept of specificity was at the basis
  这种概念在当时是
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  then of the whole idea of the germ theory of disease.
  疾病的菌源说的基础
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  Now you know Pasteur didn't invent the idea of contagion.
  传染病的概念不是巴斯德创造的
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  You've seen it with Fracastoro.
  弗拉卡斯托罗用过
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  You've seen it in John Snow,
  约翰·斯诺用过
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  who talked about the possibility of animalcules.
  他曾经提到过微生物存在的可能性