Thermo Scientific™ STAA Agar Base (Dehydrated)

Description

Isolate Brochotrix thermosphacta from food samples with Thermo Scientific™ Oxoid™ STAA Agar Base (Dehydrated). STAA Medium (STAA Agar Base + STAA Selective Supplement SR0151) is based on the formulation described by Gardner¹ and is recommended for microbiological examination of meat and meat products in the ISO Standard 13722:1996.

Brochotrix thermosphacta is a Gram-positive rod and constitutes a significant proportion of the spoilage flora of meat and meat products. Although Brochothrix thermosphacta is not considered to be pathogenic, it is an economically important meat-spoilage organism because it grows in a wide variety of meats and meat products and produces malodorous metabolic end products which make affected meat unpalatable³.

STAA Medium is made selective by the inclusion of streptomycin sulphate, thallous acetate and actidione (cycloheximide). STA Medium is modified from the original formulation by removal of the toxic selective agent cycloheximide as recommended by the NMKL. According to this method the medium is applicable for meat, meat products and some fish products.

Streptomycin sulphate inhibits some Gram-positive organisms and most Gram-negatives at higher concentrations, while Brochothrix thermosphacta remains resistant. Thallous acetate inhibits most yeasts as well as many aerobic and facultatively anaerobic bacteria. The incorporation of cycloheximide serves to further inhibit yeasts and filamentous fungi.

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Remel™ and Oxoid™ products are now part of the Thermo Scientific brand