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水蛭有助研究热带雨林动物病症
来源:中国科学报      作者:唐一尘      时间:2017-04-10 19:47      关键词:
摘要:水蛭看起来也许很“草根”,但它的食血性与能够止痛的唾液却被当做有效工具用于全世界的医疗行业中。

野生水蛭帮科学家寻找患病动物。图片来源:REGIS DUVIGNAU

水蛭看起来也许很“草根”,但它的食血性与能够止痛的唾液却被当做有效工具用于全世界的医疗行业中。而且,根据一项最新研究,它们黏滑的吸管能够为人类提供另一项服务:帮助科学家追踪那些生活在热带雨林中的稀有动物的健康情况。

在水蛭吸食了某种动物的血液后,这部分血液将在它体内保存数月,研究人员已经开始利用水蛭的这种能力去寻找那些神出鬼没的哺乳动物,比如中南大羚,一种生活在越南丛林中非常稀有的鹿。

然而最近,研究人员决定对水蛭进行测试,以判断它们体内是否不仅储存了每位“受害者”的血液,而且还有它们所携带的疾病的信息。

当然,科学不能空口无凭,研究人员将人类血液灌入猪肠中,该血液中含有4种不同的病毒,其中包括某种疱疹病毒。之后,研究人员让医用蛭吸吮该血液生成的泡沫,50天后,他们将水蛭解剖并放大其体内的基因材料,研究团队仍能检测到四种病毒中的三种。相关论文近日刊登在《欧洲野生动物研究》期刊。

研究人员表示,这揭示野生水蛭在它们吸血过后的数周内都能保存“受害者”的健康信息,与它们作为医学用途时储存基因材料一样长久。该研究团队表示,这个研究能提供一种更简单的方式,追踪那些人们难以进入其栖息地的患病野生动物。

毕竟寻找野生水蛭不是什么难事,尤其对于那些勇敢的研究人员来说,某些水蛭也非常乐意在他们身上饱餐一顿。(唐一尘)


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