YSAP, Petri Dish Type (CAT#: STEM-CC-4341-LC)

YSAP medium is a selective culture medium designed to isolate Yersinia enterocolitica from clinical samples. It utilizes mannitol fermentation (detected by neutral red) to produce colorless colonies with red centers, while crystal violet, sodium deoxycholate, and irgasan suppress Gram-positive and Gram-negative competitors. Non-mannitol-fermenting bacteria form transparent colonies due to their inability to acidify the medium.

Composition
Peptone: 17.0g/L
Proteose Peptone: 3.0g/L
Yeast extract: 2.0g/L
Manitol: 20.0g/L
Sodium pyruvate: 2.0g/L
Sodium chloride: 1.0g/L
Magnesium sulphate: 0.01g/L
Sodium deoxycholate: 0.5g/L
Neutral red: 0.03g/L
Crystal violet: 0.001g/L
Agar: 13.5g/L
Cefsulodin: 0.004g/L
Irgassan: 0.004g/L
Novobiocin: 0.0025g/L
Type: Petri Dish
Package: 50