This commensal organism is part of the gastrointestinal tract flora and can become extremely virulent, often in the setting of immuno-suppression such as neutropenia, occult malignancy(commonly caecal) and poorly controlled diabetes.
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美
- 這種（與人類(lèi)）共生生物是胃腸道菌群的一部分，可以變得毒性巨大，通常發(fā)生于機體免疫受抑制，如中性粒細胞減少癥，隱蔽的腫瘤（一般如盲腸），或者控制不佳的糖尿病。
