Gélose XLD

Taille

500g

500 g (en gros)

2 kg

2 kg (vente en gros)

10 kg

10 kg (vente en gros)

Prix

Quantité

Paiements sécurisés

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Gélose XLD

La gélose XLD est utilisée pour l'isolement et la différenciation des bactéries entériques à Gram négatif. Dans ce milieu, l'extrait de levure fournit les sources azotées et les glucides nécessaires à la croissance bactérienne. Le chlorure de sodium apporte les électrolytes et maintient l'équilibre osmotique. Le xylose, le lactose et le saccharose sont les glucides fermentescibles, le premier étant utilisé par la plupart des bactéries entériques, à l'exception de Shigella et Providencia. spp . Après épuisement du xylose, Salmonella (mais pas les fermenteurs de xylose non pathogènes) décarboxyle la L-lysine et inverse l'acidification du pH due à la fermentation des glucides. Le rouge de phénol sert d'indicateur de pH. Le thiosulfate de sodium et le citrate d'ammonium ferrique détectent la formation de sulfure d'hydrogène en milieu alcalin. Trois formats sont disponibles : 500 g, 2 kg et 10 kg.

PRÉPARATION : Mélanger 55 grammes de milieu dans un litre d’eau purifiée jusqu’à homogénéité. Chauffer en remuant régulièrement et faire bouillir jusqu’à dissolution complète. NE PAS AUTOCLAVER.

Littérature supplémentaire :

Informations sur le produit X24-101

Fiche de données de sécurité X24-101

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