XLT-4 AGAR

A highly selective medium for isolation and identification of Salmonellae from clinical, environmental and food samples.

Directions

Suspend 59g of XLT-4 Agar Base in 1 litre of distilled water, add 4.6ml of XLT-4 Selective Supplement and bring the medium to the boil.

Do not overheat, do not autoclave.

Cool to approximately 50°C and pour into sterile Petri dishes. It is not advised to hold the medium at 50°C for longer than 1 hour as this may cause the medium to precipitate.

Description

XLT-4 (Xylose Lactose Tergitol™ 4) Agar is a highly selective plating medium used for isolation and identification of salmonellae from clinical, environmental and food samples according to Miller and Tate¹.

The peptones and yeast extract in this formulation provide a source of amino nitrogen, along with essential nutrients and vitamins; this ensures optimal growth of salmonellae. The selective agent is Tergitol™ 4 (also known as Niaproof 4 or sodium tetradecylsulfate) which is an anionic surfactant. This largely inhibits or reduces the growth of unwanted background flora. The background colour of the plate is red, due to the inclusion of the phenol red, which will change colour due to pH changes from fermentation and decarboxylation reactions.

Appearance

Dehydrated medium: straw coloured, free-flowing powder

Prepared medium: clear red gel

Storage conditions and Shelf life

The dehydrated medium should be stored at 10-30°C and used before the expiry date on the label.

Prepared medium may be stored for up to 2 weeks at 2-8°C.

Quality control

รายละเอียดสินค้า

รหัสสินค้า : CM1061

ยี่ห้อ : Oxoid

Documents & Downloads

Technical Data Sheet คลิกที่นี่

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