Himedia Costein’s LDS Test Medium

Costein’s LDS Test Medium

Details

Costein’s LDS Test Medium is recommended for identification of members of Enterobacteriaceae on the basis of lysine decarboxylase (LDC) and hydrogen sulphide (H2S) production. LDC-negative and H2S negative organisms show yellow coloured growth e.g. Citrobacter, Proteus vulgaris, Proteus mirabilis, Providentia, Enterobacter, Shigella. LDC-positive and H2S positive organisms give black colour and may be surrounded by a violet zone e.g. Salmonella, Edwardsiella and others. LDC-positive and H2S negative organism are violet in colour e.g. Escherichia, Klebsiella, Hafnia, Serratia and some rare Salmonella and others.