Methods Through field epidemiological investigation, residual food, the vomited matter, excrement and anal swab of the patients, the anal swab of the cooks were all collected, sampled and tested.
方法进行现场流行病学调查，采集留样食物样品、患者呕吐物、排泻物、肛拭子，厨师肛拭子检测分析。
Methods Through field epidemiological investigation, residual food, the vomited matter, excrement and anal swab of the patients, the anal swab of the cooks were all collected, sampled and tested.
方法进行现场流行病学调查，采集留样食物样品、患者呕吐物、排泻物、肛拭子，厨师肛拭子检测分析。
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