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Yersinia Hibernica
''Yersinia hibernica'' is a species of ''Yersinia'' that was originally isolated in a pig-production environment. The type strain is CFS1934 (= NCTC 14222 = LMG 31076). This species has previously been misidentified as ''Yersinia enterocolitica'' and ''Yersinia kristensenii'' but it may be distinguished biochemically by lack of sucrose utilization. In addition to pig related environments, ''Y. hibernica'' has also been isolated from the feces of ''Rattus norvegicus'' and ''Hydrochoerus hydrochaeris''. Etymology ''Hibernica'', from Hibernia, pertaining to Ireland from where the type strain was isolated. References External linksLPSN: Species ''Yersinia hibernica'' Yersinia, hibernica Bacteria described in 2019 {{Enterobacterales-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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. The agar was developed by Welton Taylor in 1965. It has a pH of approximately 7.4, leaving it with a bright pink or red appearance due to the indicator phenol red. Sugar fermentation lowers the pH and the phenol red indicator registers this by changing to yellow. Most gut bacteria, including ''Salmonella'', can ferment the sugar xylose to produce acid; ''Shigella'' colonies cannot do this and therefore remain red. After exhausting the xylose supply ''Salmonella'' colonies will decarboxylate lysine, increasing the pH once again to alkaline and mimicking the red ''Shigella'' colonies. Salmonellae metabolise thiosulfate to produce hydrogen sulfide, which leads to the formation of colonies with black centers and allows them to be differentiated from the similarly coloured ''Shigella'' colonies. Other Enterobacte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
