GB 4789.38-2025 National Food Safety Standard Food Microbiological Examination for the Counting of Escherichia Coli

This standard specifies the method for counting Escherichia coli (E. coli) in food.

The first method of this standard is applicable to the counting of E. coli in foods with low E. coli content; the second method is applicable to the counting of E. coli in foods with high E. coli content, and is not suitable for counting E. coli in shellfish and shellfish products.

Contents

1. Scope

2. Testing Principles

3. Equipment and Materials

4. Culture Medium and Reagent

5. Testing Procedure

6. Operating Steps

7. Results and Report

8. Testing Procedure

9. Operating Steps

10. Results and Report

Appendix A Culture Medium and Reagent

Appendix B Most Probable Number (MPN) Table for Escherichia Coli in Food