Hektoen Enteric Agar Shigella

Hektoen enteric (HE) agar - ScienceDirect, Hektoen Enteric Agar | Culture Media | Microbe Notes, BD Hektoen Enteric Agar (HE Agar), Hektoen Enteric Agar - an overview | ScienceDirect Topics, 01/01/2003 ÿú Hektoen enteric (HE) agar is a medium for the isolation of Shigella and Salmonella.It relies on the use of bile salts for selective inhibition and two indicator systems: (1) bromothymol blue and acid fuchsin as indicators of carbohydrate dissimilation and (2) ferric iron as an indicator of the formation of hydrogen sulfide from thiosulfate.

Hektoen Enteric Agar (HEA) was developed in 1967 by King and Metzger of the Hektoen Institute in order to improve the isolation of Shigella and Salmonella organisms when compared with other media frequently utilized at that time.1,2 This medium is considered to be moderately selective, and is particularly useful in the isolation of Shigella .

Hektoen Enteric Agar was developed by King & Metzger 1. The high peptone content offsets the inhibitory effect of bile salts on Shigella species in particular. The additional carbohydrates (sucrose and salicin) give better differentiation than lactose alone and the lower.

Highly selective medium include Salmonella ? Shigella and Hektoen enteric agars. Some Shigella spp.

such as S. dysenteriae type I, are unable to grow on highly selective Salmonella ? Shigella medium. On this agar medium, Shigella produces colorless, translucent colonies.

XLD agar, Sabouraud agar, Nutrient agar, Mueller-Hinton agar, Mannitol salt agar, Eosin Methylene Blue, MacConkey agar, XLD agar, Mannitol salt agar, TSI slant;"