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.

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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.

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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.

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