Hektoen enteric agar

Hektoen enteric agar (HEK or HE or HEA) is a selective and differential agar[1] primarily used to recover Salmonella and Shigella from patient specimens. HE contains indicators of lactose fermentation and H2S production; as well as inhibitors to prevent the growth of gram positive bacteria. The pattern of lactose fermentation and H2S production aids in the identification of the organism subbed to the plate. Specifically, Salmonella produces black colonies, whereas Shigella produces translucent green colonies. The color of the agar itself is green. Sugars in media usually include lactose, sucrose, and salicin.

See also

References

  1. ^ Goo VY, Ching GQ, Gooch JM (September 1973). "Comparison of brilliant green agar and Hektoen enteric agar media in the isolation of salmonellae from food products". Appl Microbiol 26 (3): 288–92. PMC 379776. PMID 4584576. http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=379776. 

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Selective media
Differential media
Fungal media
Nonselective media
Other/ungrouped media

M: BAC

bact (clas)

gr+f/gr+a(t)/gr-p(c)/gr-o

drug(J1p, w, n, m, vacc)