Conclusion the contamination of air in the operating room is severe, the restriction of the activity and the number of staff in the operating room can reduce the precipitating bacterial density.

结论手术过程中洁净手术室空气细菌污染严重，限制手术人员活动和人数可降低沉降菌密度。

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The FSA said it was "highly likely" criminal activity was to blame for the contamination.

BBC: Horsemeat scandal: Don't dump meat, says food minister