Мясо и мясные продукты. Обнаружение и подсчет количества предполагаемых колибактерий и кишечной палочки (контрольный метод)
Название (англ.):
Meat and meat products; Detection and enumeration of presumptive coliform bacteria and presumptive Escherichia coli; (Reference method)
Описание (англ.):
The method consists in mincing of a test sample and then maceration of a test portion with a sterile diluent. Preparation, from the macerate, of decimal dilutions, which are inoculated in triplicate into a liquid selective medium. From the number of tubes showing gas production after incubation at 30 degreescentigrade, determination of the most probable number of presumptive coliform bacteria per gram by using the MPN table (see an annex). For the enumeration of presumptive E. coli, inoculation of tubes containing the liquid selective medium and tubes containing tryptone water, from the positive tubes.