ISO 16649-2:2001

Microbiology of food and animal feeding stuffs - Horizontal method for the enumeration of beta-glucuronidase-positive Escherichia coli - Part 2: Colony-count technique at 44 degrees C using 5-bromo-4-chloro-3-indolyl beta-D-glucuronide

La présente partie de l'ISO 16649 spécifie une méthode horizontale pour le dénombrement des Escherichia coli bêta-glucuronidase positive dans des produits alimentaires destinés à la consommation humaine ou à l'alimentation des animaux. Elle utilise une technique de comptage des colonies après incubation à 44 °C sur un milieu solide contenant un substrat chromogénique pour la détection de l'enzyme bêta-glucuronidase. AVERTISSEMENT - Certaines souches d'Escherichia coli qui ne poussent pas à 44 °C et, en particulier, celles qui sont bêta-glucuronidase négative, telles que les Escherichia coli O157, ne peuvent pas être mises en évidence.

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