DANSK DS/ISO 21528-1 PDF

This part of ISO 21528 specifies a method, with pre-enrichment, for the detection of Enterobacteriaceae. It is applicable to – products intended for human consumption and the feeding of animals, and – environmental samples in the area of food production and food handling. Enumeration is carried out by calculation of the most probable number (MPN) after incubation at 37 °C (or 30 °C)1) in liquid medium. This method is applicable – when the microorganisms sought are expected to need resuscitation before enrichment, and – when the number sought is expected to be in the range 1 to 100 per millilitre or per gram of test sample. A limitation on the applicability of this part of ISO 21528 is imposed by the susceptibility of the method to a large degree of variability (see Clause 11).