AL (Agar Listeria according to Ottaviani and Agosti medium) Agar

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AL (Agar Listeria according to Ottaviani and Agosti Medium)

AL medium (Agar Listeria according to Ottaviani and Agosti) is based on the simultaneous detection of 2 enzyme activities: b-glucosidase and phosphatidylinositol-specific phospholipase C (PI-PLC).

B-D-glucosidase activity, common to Listeria genus, is detected using a chromogenic substrate (X-glucoside). Its hydrolysis induces the formation of a blue to blue-green colour in all Listeria colonies.

PI-PLC is an enzyme only detected in pathogenic Listeria species: L. monocytogenes and L. ivanovii. AL medium contains phosphatidylinositol which, when it breaks down, produces an opaque halo around colonies of bacteria of these 2 species: 24 hrs for L. monocytogenes and 48 hrs for L. ivanovii.

Fraser 1/2 Broth #355-5797
Fraser 1/2 Broth

355-5797
225 ml x 6 bottles

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Fraser Broth Base #356-4604
Fraser Broth Base

356-4604
500 g

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Fraser 1/2 Supplement #356-4616
Fraser 1/2 Supplement

356-4616
10 vials (1 vial q.s.p. 2.25 l)

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Buffered Peptone Water/Broth

355-4179
225 ml x 6 bottles

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Buffered Peptone Water/Broth

355-5790
5 L x 2 bags

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Buffered Peptone Water/Broth

356-4684
500 g

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