For a pollution foreign microorganisms of raw materials and semi-finished products in the course of their processing and finished goods at storage by a necessary condition is maintenance of purity on a workplace, in production rooms, sanitary processing of the equipment, stock, container.
Bacterial impurity of hands and clothes is defined by research of microflora of washouts. In washouts which take before work, usually define the general obsemenennost and availability of colibacillus. of hands is estimated by quantity of microorganisms at 1 ml of washout:
Total of bacteria — this quantity of colonies of the and facultative and anaerobic mesophilic saprofitny bacteria growing at crops of 1 ml of undiluted water on a myasopeptonny agar (MT for 24 h at 37 °C.
Identification of pathogenic microorganisms in water ( of a typhoid, cholera and dysentery) is carried out by local sanitary and epidemiologic stations only on epidemiological indicators.