ISO 7251:2005/Amd 1:2023
                            
                        
                            
                                Microbiology of food and animal feeding stuffs — Horizontal method for the detection and enumeration of presumptive Escherichia coli — Most probable number technique — Amendment 1: Inclusion of performance testing of culture media and reagents
                            
                        
                        
                        
                        
                            
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