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Posted by CDCeHealth - Tuesday, Jun. 17th at 6:13 pm
Salmonella sp. (1985)
After 24 hours, this inoculated XLD agar culture plate cultivated colonial growth of Gram-negative, rod-shaped and facultatively anaerobic Salmonella sp. bacteria.
Xylose Lyseine (XL) agar is used when trying to culture and isolate Gram-negative enteric bacilli, i.e., rods. When XL agar is supplemented with sodium thiosulfate, ferric ammonium citrate, and sodium deoxycholate, it is then termed XLD agar, and is then an even more selective medium than XL alone. The presence of any black colored area indicates the deposition of hydrogen sulfide, (H2S) under alkaline conditions.
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