diff可以导致腹泻，有时情况会非常严重，并且还可能会引起致命性的结肠感染病。

C. diff causes diarrhea, and in some cases a particularly severe and sometimes lethal infection of the colon.

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然后，如果他们病得非常严重，情况会更糟糕。

And, the situation would be even worse if they became sick as a dog.

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