塔斯马尼亚恶魔如何对抗致命传染性癌症
Deep in Tasmania's eucalyptus forests, a strange and silent enemy threatens the world's largest carnivorous marsupial. The Tasmanian devil—a creature famous for its fierce screeches and powerful jaws—is being decimated by a contagious cancer known as Devil Facial Tumor Disease, or DFTD. This rare ailment is one of only a few transmissible cancers in nature, spreading when devils bite each other during feeding or mating. Because the tumors grow around the mouth and face, the animals slowly starve to death, often within months.
在塔斯马尼亚桉树林深处，一种诡异而无声的敌人正威胁着世界上最大的食肉有袋类动物的生存。塔斯马尼亚恶魔——以其凶猛的尖叫声和强大的下颚而闻名——正遭受一种名为恶魔面部肿瘤病（DFTD）的传染性癌症的毁灭性打击。这种罕见的疾病是自然界中仅存的几种可传播癌症之一，当恶魔在进食或交配时互相咬伤便会传播。由于肿瘤生长在嘴部和面部周围，这些动物会慢慢饿死，往往在几个月内就会死亡。
Since it was first documented in 1996, DFTD has slashed devil populations by up to 80 percent in some areas, pushing the species toward endangerment. Scientists initially feared the entire population could collapse, as the cancer cells themselves act like parasites—jumping from one host to another without triggering an immune response. The disease spread so effectively because devil populations had very low genetic diversity, making them almost identical immunologically. This meant that every devil was equally vulnerable, leaving conservationists scrambling for solutions.
自1996年首次被记录以来，DFTD在某些地区已将恶魔种群数量削减高达80%，使该物种濒临灭绝。科学家们最初担心整个种群可能会崩溃，因为癌细胞本身就像寄生虫一样，能在不触发免疫反应的情况下从一个宿主跳跃到另一个宿主。该疾病之所以能如此有效地传播，是因为恶魔种群的遗传多样性极低，导致它们在免疫学上几乎完全相同。这意味着每一只恶魔都同样脆弱，迫使保护工作者急于寻找解决方案。
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