For the microbiological assay of Colistimethate sodium sulphate using Bordetella bronchiseptica and Escherichia coli in accordance with British Pharmacopoeia.
Antibiotic Assay Medium B as per British pharmacopoeia is used for the microbiological assay of Colistimethate sodium and Colistin sulphate using Bordetella bronchiseptica and Escherichia coli as test organism.