Hektoen enteric agar

Hektoen enteric agar
Gram negative Shigella sonnei bacteria which spent 48 hours cultured on Hektoen enteric agar (HEK).
AcronymHEK, HE, or HEA
InventorHektoen Institute
ManufacturerHektoen Institute

Hektoen enteric agar (HEK, HE or HEA) is a selective and differential agar primarily used to recover Salmonella and Shigella from patient specimens. HEA contains indicators of lactose fermentation and hydrogen sulfide production; as well as inhibitors to prevent the growth of Gram-positive bacteria. It is named after the Hektoen Institute in Chicago, where researchers developed the agar.

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