4In 2007, Barrangou et al. demonstrated for the first time the function of CRISPR/Cas9 as a defensive mechanism of bacteria against bacteriophage attacks by a technique called “plaquing” which builds upon the technique of “plating” bacteria on agar. Plaques of viruses on agar are areas without growth of bacteria due to viral attacks.
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然而，按以往相关要求，包子铺的现制现售区域和生鲜肉销售场所要隔10米以上，或有可密闭遮盖的防护罩等防护措施。但这家冷鲜肉店面积有限，“螺蛳壳”里难“做道场”。