Multicompartimenté Support for culture media, filled or not culture media (micro) biological complementary. There is provided a doubling of partitions that separate the sectors on the culture media, as provided in the division of the support compartments of different sizes, so that it comprises at least one smaller than the other compartment, intended to be filled with a selective medium and at least one larger compartment than others, to be filled with an elective medium, an elective culture medium again being developed for this purpose, in particular containing an indicator of acidity and sucrose and / or lactose, or mannitol and made elective against gram-negative bacteria by adding clindamycin or lincomycin and, for some applications, a macrolide and / or substance inhibiting the growth of enterococci and / or yeast-bacteria and fungi.
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