某医院新生儿病房发生多例剥脱性皮炎患者,为追踪传染源,对从医务人员及病儿分离得到的金黄色葡萄球菌,应进一步做的试验是
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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