BSIS016649-1:2018 BSl Standards Publication Microbiology of the food chain Horizontal method for the enumeration of beta- glucuronidase-positive Escherichia coli Part 1: Colony-count technique at 44 °C using membranes and 5-bromo-4-chloro-3-indolylbeta-D-glucuronide bsi. BSISO16649-1:2018 BRITISH STANDARD Nationalforeword This British Standard is the UK implementation of IS0 16649-1:2018.It supersedes BS IS0 16649-1:2001, which is withdrawn. The UK participation in its preparation was entrusted to Technical Licensed copy: Imperial College , Imperial College London, Version correct as of 28/04/2018 Committee AW/9, Microbiology. Alist of organizations represented onthis committeecanbe obtained on request to its secretary This publication does not purport to include all the necessary provisions of a contract. Users areresponsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018 ISBN9780580945625 ICS 07.100.30 Compliance witha British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committeeon30 April 2018 Amendments/corrigendaissuedsincepublication Date Text affected BS ISO 16649-1:2018 INTERNATIONAL ISO STANDARD 16649-1 Second edition 2018-04-30 Microbiology of the food chain - Horizontal method for the enumeration of beta-glucuronidase- positive Escherichia coli - Part 1: Colony-count technique at 44 degrees C using membranes and 5-bromo-4- chloro-3-indolyl beta-D-glucuronide Microbiologie de la chaine alimentaireMethode horizontale pour ledenombrementdes Escherichia coli beta-glucuronidase positive- Partie 1: Technique de comptage des colonies a 44 degrés C au moyen demembranes etde 5-bromo-4-chloro-3-indolyl beta-Dglucuronide Reference number IS0 16649-1:2018(E) ISO @IS02018