Foundations Reading 5A

Chap 9

第9章

Reading 5A THE DISEASE DETECTIVE Six children were in the hospital. They were very sick, but the doctors didn't know what to do. They called Dr. Richard Besser, an expert on strange illnesses. Finding a Cause First, Dr. Besser needed to find the cause of the illness. He looked for germs in the children's bodies. In every child, Dr. Besser found the same type of the bacteria E. coli. He then looked at the bacteria's DNA. It showed him that this type of E. coli was dangerous. Dr. Besser knew E. coli could move from animals to humans. Had the children touched animals that carried the bacteria? Besser found other E. coli cases in the area where the children lived. But it wasn't enough. Besser then made a list of what the sick children had eaten. They had all eaten cheese, apple juice, and fish. He then made a list of what healthy children in the area had eaten. They had eaten the cheese and fish, but not the apple juice. Case Closed Besser went to where the apple juice was made. He saw animals around the apple trees. He also saw the workers using dirty apples that had fallen on the ground. More importantly, he saw that the apples were not washed before the juice was made, and that the juice was not heated. Doing these things would kill the bacteria. Besser then knew it was the apple juice that made the children sick. Besser's E. coli case had a happy ending. The children got better. And what Besser learned that day now helps keep others safe.

阅读5A 疾病侦探 医院里有六个孩子。 他们病得很重，但医生不知道该怎么办。 他们打电话给理查德·贝瑟博士，一位研究奇怪疾病的专家。 首先，贝瑟医生需要找到病因。 他在孩子们的身体里寻找细菌。 贝瑟博士在每个孩子身上都发现了相同类型的大肠杆菌。 然后他检查了细菌的DNA。 这向他表明，这种大肠杆菌是危险的。 贝瑟博士知道大肠杆菌可以从动物传播到人类。 孩子们接触过携带细菌的动物吗？ 贝瑟在孩子们居住的地区发现了其他大肠杆菌病例。 但这还不够。 然后，贝瑟列出了生病的孩子们吃了什么。 他们都吃了奶酪、苹果汁和鱼。 然后，他列出了该地区健康儿童的饮食清单。 他们吃了奶酪和鱼，但没有吃苹果汁。 Case Closed贝瑟去了制作苹果汁的地方。 他看见苹果树周围有动物。 他还看到工人们在用掉在地上的脏苹果。 更重要的是，他发现苹果在榨汁前没有洗过， 而且果汁没有加热。 做这些事情会杀死细菌。 贝瑟知道是苹果汁让孩子们生病了。 贝瑟的大肠杆菌病例有一个圆满的结局。 孩子们好多了。 贝瑟那天学到的东西现在有助于保护他人的安全。

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