infectious agent

The infectious agent responsible here was Nocardia, which is known to produce chronic abscessing inflammation.

此处引起感染的因素是诺卡菌属, 主要引起慢性脓肿.

a parasitic or infectious agent was sought for beriberi and other disease which turned out to be due to completely different aetiologies.

例如，脚气病以及其它疾病病原是由寄生虫或感染性因子导致的，然而，最后证实完全不是。

here too the infectious agent is elusive -- yet incredibly hardy.

然而,人们也仍然未找出感染因子 —— 仍是令人难以想象地困难.

Coxiella burnetii is an obligate intracellular bacterium that multiplies within the phagolysosomes of eukaryotic cells and causes a worldwide zoonotic disease, Q fever. It is an air-borne infectious agent and recognized as an important agent of biological threats.

贝氏柯克斯体是一种专性细胞内寄生菌，为重要人畜共患病Q热的病原体，也是一种重要的生物战剂和生物恐怖剂。

the way the body recognises an infection is by examining molecules from the infectious agent.

身体以通过对传染因子的分子检查来的方式来识别感染.