在世界各地的大多数犬类身上都有发现CTVT，科学家认为它与澳大利亚濒危动物袋獾身上见到的一种传染性的、但更加致命的肿瘤相似。
Found in most canine breeds throughout the world, the scientists think CTVT is very similar to the transmissible but more fatal cancer seen in the endangered Tasmanian devils of Australia.
传染性面部肿瘤在袋獾中迅速蔓延，人们相信，其结果是导致这种世界上最大的袋类食肉动物的数量降低了60%以上。
An infectious facial cancer is spreading rapidly among Tasmanian devils and populations of the world's largest marsupial predator are believed to have fallen by more than 60% as a result.
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