Pathogenic factors are chemical contamination, microbial contamination, poisonous animal and plant contamination.

致病因素依次为化学性污染 、 微生物污染 、 有毒动植物污染和不明原因污染.

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A clear case of chemical contamination?

很明显的化学污染事件?

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Objective : To understand the situation of chemical contamination for foods in Zhaoqing City.

目的: 了解肇庆市本地产的主要食品的化学污染状况.

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