Listeria species in environmental samples from the food plant were detected by 3M Petrifilm by identifying the 210 typical colonies and 70 nontypical colonies from 112 environmental samples.

摘集112个样本，挑取了210个典型菌落，70个非典型菌落进行鉴定，评估3M测试片对食品加中李斯特菌的检测能力。