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.

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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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