BacterChrom™ Strep A Agar Plates

Ready-to-use chromogenic medium on 90mm plates for qualitative analysis and differentiation of Streptococcus pyogenes – Group A Streptococcus (GAS) in throat infection samples.
Code: 01017
Packaging: 10 plates/box or as per customer requirements.
Storage Conditions: 2–8°C.
Transportation: Ambient temperature.
Shelf Life: 03 months from the date of manufacture.

INTENDED USE

BacterChrom™ Strep A Agar is a selective chromogenic culture medium designed for the qualitative detection, differentiation, and presumptive identification of Group A Streptococcus (Streptococcus pyogenes). It aids in diagnosing throat infections caused by this pathogen using throat swabs. Results are observed after 18–24 hours of incubation at 35–37°C in a CO₂ atmosphere.
This medium is not intended for diagnosing infections, nor for monitoring or guiding treatment. Concomitant cultures are necessary for further microbiological testing or epidemiological typing.

PRINCIPLES

BacterChrom™ Strep A Agar uses specific chromogenic substrates to detect enzymatic activity unique to target microorganisms, producing distinct colony colors. The selective agents in the medium inhibit non-target organisms, ensuring high specificity and clear visual differentiation of Group A Streptococcus. This enables rapid presumptive identification and supports efficient laboratory workflows.

Allow to warm to room temperature before inoculation, dry the plates in an incubator with the covers partially removed.
Direct streaking sample onto the plate
Incubate at 35 – 37 °C for 18 – 24 hours in a CO₂ atmosphere

RESULTS

Microorganism	Typical colony apprearance
Streptococcus pyogenes (group A)	orange to red
Other Streptococcus	steel blue or colourless
Other Gram (+) bacteria	inhibited
Yeasts	inhibited
Gram (-) bacteria	inhibited

BacterLab ensures the quality of each product batch by testing with ATCC reference strains.

For 1 liter of medium

Agar	15,0 g
Peptones and yeast extract	27,0 g
Salt	9,0 g
Chromogenic and selective mix	0,3 g
Growth factors	3,0 g
Supplement (S1)	2mL
Supplement (S2)	0,1 g

pH of the ready-to-use medium at 25°C: 7,2 ± 0,2

*Note: This ingredient is for reference only our company will formulate the ingredient according to requests or tender specifications.

Product Name	Code	Packaging
BacterChrom™ Strep A Agar	01017	10 plates/box or as per customer request.