Foreword
This standard replaces GB/T 4789.6-2003 “Microbiological examination of food hygiene - Examination of diarrheagenic Escherichia coli”.
Compared with GB/T 4789.6-2003, the main changes of this standard are as follows:
——the name of standard has been revised to “National food safety standard Food microbiological examination - Examination of diarrheagenic Escherichia coli”;
——the “terms and definitions” and “abbreviations” have been added;
——the H antigen identification in serological test has been added;
——the PCR confirmatory test has been added;
——the Annex A has been added;
——the “equipment and materials” have been revised;
——the “culture mediums and reagents” have been revised;
——the “examination procedures” have been revised;
——the O antigen-group included in diarrheagenic Escherichia coli in serological test has been revised;
——the enterotoxin test has been deleted.