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Thermo Scientific™
Streptex™ Acid Extraction Kit
Catalog number: R30951301
Thermo Scientific™
Streptex™ Acid Extraction Kit
Catalog number: R30951301
Rapidly extract and identify streptococcal Lancefield group antigens from cultured organisms using Thermo Scientific™ Remel™ Streptex™ Acid Extraction Kit in conjunction with the Streptex™ Kit (ZL50/R30950501 and ZL61/R30164701). Lancefield showed that group-specific streptococcal antigens can be extracted in soluble form and identified by precipitation reactions with homologous antisera1. The Streptex™ kit requires at least 10 minutes incubation at 37°C to extract the group antigen. Reagents supplied in this kit allow a more rapid extraction of group antigen.
| Description | Streptex and Acid Extraction Kit |
| CE Marker | Yes |
| Detectable Analytes | beta-haemolytic streptococci |
| Type | Streptococcus Test Kit |
| Includes | 7mL each of Extraction Reagent 1, 2, and 3, disposable tubes, disposable tube holder, mixing sticks, sample dispensers |
| Organism Group | Lancefield A, B, C, D, F and G |
| Quantity | 50 Tests/Kit |
| Unit Size | Each |
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Species of Streptococcus are classified based on their hemolytic properties (alpha and beta). Beta-hemolytic streptococci are further classified by Lancefield grouping. The majority of species of Streptococcus possess group-specific antigens which are usually carbohydrate structural components of the cell wall.
Group-specific antigens are extracted from streptococci by nitrous acid in a simple and short incubation step. The extract is then neutralised and antigens are detected and identified with suspensions of latex particles coated with group-specific antibodies.
- Ready-to-use: Reagent kit
- Rapid extraction: Within 1 minute.
- Ease of identification: Positive result is indicated by aggregation of latex particles.
The acid extraction kit provides reagents for the extraction of Lancefield group A, B, C, F and G at room temperature (18 – 30° C). Extraction is complete within 1 minute. Group D antigen cannot be extracted with these reagents.
The latex suspensions for groups A, B, C, D, F and G are supplied in the Streptex™ Kit (ZL50/R30950501 and ZL61/R30164701) or as individual suspensions.
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Remel™ and Oxoid™ products are now part of the Thermo Scientific brand.
- Lancefield, R.C. 1938. A micro precipitin technic for classifying hemolytic streptococci, and improved methods for producing antisera. Proc. Soc. Exp. Biol., N.Y., 38:473.
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