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This document specifies a method for the detection of heat-stable DNase (thermonuclease) produced by coagulase-positive staphylococci in milk and milk-based products. The enzyme can be used as an indicator that staphylococcal growth has reached hazardous levels and reveal the potential presence of staphylococcal enterotoxins. This document has been prepared by Working Committee NA 057-05-13 AA "Milch und Milchprodukte - Probenahme- und Untersuchungsverfahren" ("Milk and milk products - Methods of sampling and analysis") at DIN Standards Committee Food and Agricultural Products (NAL).
This document replaces DIN 10197:1988-05 .