Methods the amount of bacterium contamination and pathogenic bacteria of the used disinfectant was monitored reverse medium method with closed filter-counter-culture dish.

方法用封闭式薄膜计数培养器反注培养基法对临床使用中的消毒剂染菌量及致病菌进行监测。

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He is counter-suing Monsanto for defamation and contamination of his land.

ECONOMIST: Canada

However, Stan Woznicki, the agency's counter-pollution officer, said a legal discharge "would be highly unlikely to result in the sort of contamination we have seen".

BBC: Richard Drax MP to question government over bird pollutant