Ticks can carry a nasty disease which affects humans.

壁虱可传播危害人类的严重疾病。

《牛津词典》

Aortic stenosis is a nasty disease.

主动脉瓣狭窄是一个讨厌的疾病。

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That is nasty for the animals, which may catch the disease if the vaccine has not been made properly; indeed, this is why the tests are carried out.

这对动物来说是极为危险的，因为如果疫苗的配制不当就会导致这些动物感染疾病；而说实话，这也是为什么要进行这些实验的原因。

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But while the casualties continue to mount, so does scientific understanding of this nasty infectious disease.

ECONOMIST: SARS: Getting a grippe | The

It is a particular gamble if the child is conceived partly to provide a bone marrow graft for a brother or sister with a nasty genetic disease: not only might the new baby turn out be a poor match for transplantation, but might also have inherited the same disorder as his or her sibling.

ECONOMIST: Gene genies

That's when the Centers for Disease Control and Prevention reported finding a nasty infection that hit more than 100 pedicure patients.

CNN: For pedicures, be careful where you step