BioTrading 14 cm

Petri dish 14 cm.

Baird Parker Agar is a selective medium for the detection and enumeration of coagulase-positive Staphylococci in food samples as described in ISO 6888-1.

Typical formula (g/l)*: Tryptone 10.0; Meat extract  5.0; Yeast extract 1.0; Lithium chloride 5.0; Glycine 12.0; Sodium pyruvate 10.0; Agar 13.0; Potassium tellurite 0.1; Egg yolk emulsion 50 ml
Formula conform: ISO 6888-1, ISO 22718
Interpretation: Typical colonies of S. aureus are black, shiny, convex and may be surrounded by clear zones of approximately 2-5 mm. An opaque ring within the clear zone may appear after 48 hours of incubation.

*Adjusted and/or supplemented as required to meet performance criteria

Listeria ALOA, Petri dish 14 cm.

Also known as: Listeria chromogenic agar (Agosti and Ottaviani formulation), ALOA

Intended use: A selective medium for the isolation and presumptive identification of Listeria monocytogenes from foodstuffs and related materials.

Typical formula (g/l)*: Meat peptone 18.0; Tryptone 6.0; Yeast extract 10.0; Lithium chloride 10.0; Sodium chloride 5.0; Disodium hydrogen phosphate anhydrous 2.5; Sodium pyruvate 2.0; Glucose 2.0; Glycerophosphate 1.0; Magnesium sulfate 0.5; 5-bromo-4-chloro-3-indolyl-ßD-glucopyranoside 0.05; Agar 13.5; Nalidixic acid 0.02; Ceftazidime 0.02; Polymyxin B sulfate 76700 IU; Cycloheximide 0.05; L-alpha-phosphatidylinositol 2.0

Formula conform: ISO 11290

Interpretation: Listeria monocytogenes: blue to blue-green colonies, round, regular, surrounded by an opaque halo, diameter from 1 to 2 mm. Listeria spp.: blue to blue-green colonies, round, regular, without an opaque halo, diameter from 1 to 2 mm.

*Adjusted and/or supplemented as required to meet performance criteria.