传染性的英文：
epidemicity

The infective larva of some tapeworms,characterized by its solid elongated body.
全尾幼虫以紧密排列的长形身体为特征的一些绦虫的传染性幼虫

Colds are catching.
感冒是有传染性的。

Bad colds are catching.
恶性感冒是有传染性的。

Scarlet fever is highly contagious.
猩红热传染性很强.

Equine infectious anaemia
马传染性贫血病

Flu is highly infectious.
流感的传染性很强.

Transmissible gastroenteritis is a highly contagious, enteric disease of swine
传染性胃肠类是猪的一种高度接触传染性肠道疾病。

infectious myxomatosis of rabbit
兔传染性粘液瘤病

To implant microorganisms or infectious material into(a culture medium.
菌体培养把微生物或传染性物质植入(培养基)

When you have this anthema you are still infectious.
身上还有这种疹子就仍然有传染性。

The corruption had become epidemic.
这种腐化已成为社会上的一种歪风。

Violence is reaching epidemic levels.
暴力达到了流行的程度。

A great epidemic burst forth.
突然发生了一场大瘟疫。

There's an epidemic of serial killings.
连环杀人现象猖獗。

The news of the epidemic struck terror into the population.
流行病蔓延的消息使居民感到恐慌。