新托福阅读材料汇总：青蛙体内的天然抗生素

青蛙体内的天然抗生素

Frogs protect themselves by secreting chemicals that kill germs on their skin. So the theory is that some of these chemicals could be used as antibiotics.

To find out, researchers in the United Arab Emirates asked colleagues across the world to swab any frogs they found and send them their secretions. They received samples from more than six thousand different species and identified more than a hundred germ-killing chemicals.

Because they've not been used to combat human diseases before, it's hoped that they might be able to kill bacteria that had become drug-resistant.

One problem though is that many of these newly-identified chemicals are toxic. So the next step will be to adapt them to make them benign to patients but lethal to bacteria.

The researchers point out that their work highlights the importance of preserving frog diversity. They say that many species whose skin might contain potentially valuable medicinal substances may become extinct soon because of a loss of habitat and water pollution.

Notes：

to secrete something(指动物或植物器官)分泌

germs细菌

antibiotics抗生素

to swab something(医学检验)涂片

sample采样

species物种

to combat something与…斗争

drug-resistant抗药的，耐药的

toxic有毒的

benign有益的，良性的

bacteria(复数)细菌

to highlight something强调，突出

to preserve something保护

diversity多样性

extinct灭绝 habitat栖息处