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  • Title: [Changes in microorganism sensitivity to antibiotics as affected by divalent metal ions].
    Author: Chaĭkovskaia SM, Navashin SM, Tochenaia NP, Levkovich NM, Makarova RA.
    Journal: Antibiotiki; 1981 Feb; 26(2):97-101. PubMed ID: 6782950.
    Abstract:
    Ca+ and Mg+ in nutrient media significantly influence the results of antibiotic sensitivity determination in microorganisms. The data of the study are indicative of a necessity for the media standardization with respect to the content of bivalent metal ions. It is recommended that agar-agar manufactured by the South Sea Factory (tafuinsky) be used for preparation of nutrient media for determination of microbial sensitivity to antibiotics and Hottinger meat pancreatic digest as the nitrogen source providing the content of 120 mg per cent of amine nitrogen in the medium.
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