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Hektoen enteric agar (HEK, HE or HEA) is a selective and differential agar [1] 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.
Salmonella growing on XLD agar. Xylose lysine deoxycholate agar (XLD agar) is a selective growth medium used in the isolation of Salmonella and Shigella species from clinical samples and from food. [1] [2] The agar was developed by Welton Taylor in 1965. [3]
Rappaport-Vassiliadis soya peptone broth (RVS broth) is used as an enrichment growth medium for the isolation of Salmonella species. [1] It is not recommended for the enrichment of Salmonella Typhi or Paratyphi, which is inhibited due to the malachite green in RVS broth. [2] It is an alternative to selenite broth.
Salmonella spp appear to be yellow or colourless colonies, often with a dark centre. As there are many bacteria that also look like Salmonella on DCA, it is widely recommended that more selective agars are used for the identification of Salmonella, namely xylose lysine deoxycholate (XLD) agar. This growth medium is heat-sensitive and should be ...
Endo agar. Endo agar (also called Endo's medium) is a microbiological growth medium with a faint pink colour. [1] Originally developed for the isolation of Salmonella typhi, it is now used mostly as a coliform medium.
The CDC is investigating a series of salmonella outbreaks tied to Italian-style meats, like prosciutto, pepperoni and salami. Heat your meat: Pepperoni, salami, Italian-style meats investigated by ...
After 24 hours of growth, this image depicts four different agar media culture plates that had been inoculated with Shigella sp., Escherichia sp., and Proteus sp. bacteria, (clockwise: MacConkey, Shigella-Salmonella, Bismuth Sulfite, and Brilliant Green agars). Bismuth sulfite agar is a type of agar media used to isolate Salmonella species.
Selenite broth is used as a selective medium for the isolation of Salmonella species. [1] Selenite broth was originated by Leifson, [2] while observing good recovery of Salmonella spp. and reduced growth of fecal coliforms. Selenite broth is used as a selective enrichment for the cultivation of Salmonella spp. that may be present in small ...