Английский язык по новостям: Battle of the bedbugs

  • 23 июля 2013
Клопы
Image caption Клопы питаются человеческой кровью, поэтому они селятся везде, где ночует человек

В разделе Learning English мы публикуем видео- и аудиоуроки английского языка, истории о культуре и традициях англоязычных стран.

В этом аудиоматериале: ученые считают, что прорыв в борьбе с клопами не за горами.

Слушайте, читайте, учите новую лексику.

<hr>

Scientists may be on top in the battle against bedbugs. These insects are one of the most difficult to control. But research, from the journal Scientific Reports, could help scientists to develop new, improved control methods.

<hr>

They feast on our blood while we sleep - leaving itchy, red welts as their calling card.

Bedbugs are an insect that many would like to see the back of.

But in North America, Europe and Australia, infestations are on the rise - and our insecticides are losing their bite.

Media playback is unsupported on your device

Researchers at the University of Kentucky in the US have found 14 genes associated with resistance to these chemicals.

They're causing a number of biological changes in the bedbugs.

These include the development of a thicker skin that stops the poisons from penetrating and mutations within the insects' bodies that prevent the toxins from hitting the nervous system.

The genes linked to these changes are active in the insect's tough outer shell - creating a formidable first line of defense.

These findings could help scientists to develop new insecticides that could either turn these genes off or bypass the pest's molecular shields.

But until these substances are developed, exterminators are having to resort to more primitive tactics.

<hr>

Изучаемая лексика в контексте:

  • itchy - вызывающие зуд
  • welts - следы от укуса
  • calling card - визитной карточки
  • infestations - заражение паразитами
  • insecticides - средства от насекомых
  • penetrating - проникновения внутрь
  • mutations - мутаций
  • toxins - токсины
  • formidable - внушительную
  • exterminators - истребители насекомых

<br> Другие материалы рубрики "По новостям"

Также в разделе Learning English:

увлекательное учебное видео, аудио и тесты

Новости по теме