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Thermo Scientific™ DrySpot™Staphytect Plus™Latex Agglutination Test
Rapidly identify and differentiate Staphylococcus aureus by detecting clumping factor, Protein A, and certain capsular polysaccharides.
Marca: Thermo Scientific™ DR0100M
365.42 EUR valido fino al 2024-12-31
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Descrizione
Rapidly identify and differentiate Staphylococcus aureus with Thermo Scientific™ DrySpot™ Staphytect Plus™ Latex Agglutination Test. DrySpot Staphytect Plus detects clumping factor, Protein A, and certain capsular polysaccharides found in methicillin resistant S.s aureus (MRSA) to differentiate S.s aureus from staphylococci that do not possess these properties. Test cards contain pre-dispensed reagents that are dried onto the reaction areas for test convenience, extended shelf-life when compared to wet reagents, and room temperature storage.
DrySpot Staphytect Plus latex agglutination test uses blue latex particles, which are coated with porcine fibrinogen and rabbit IgG, then pre-dried onto reaction cards for the detection of clumping factor, Protein A, and capsular polysaccharides of S. aureus.
- Long shelf-life: two years from the date of manufacture
- Flexible storage: can be stored in a fridge or at room temperature (2-25°C)
- No dispensing errors: reagents are pre-dried onto reaction cards
- Easy-to-read blue latex
- Rapid results: within 20 seconds
- Excellent sensitivity: detects three properties of S. aureus for wider strain identification
Traditionally, differentiation between coagulase-positive and coagulase-negative staphylococci has been performed either with the tube coagulase test that detects extracellular staphylocoagulase or the slide coagulase test that detects the clumping factor (bound coagulase) present on the bacterial cell surface. It has been reported that approximately 97% of human strains of S. aureus possess both bound coagulase and extracelluar staphylocoagulase. Protein A is found on the cell surface of about 95% of human strains of S. aureus and has the ability to bind the Fc portion of immunoglobulin G (IgG)1.
Certain methicillin-resistant strains of S. aureus (MRSA) may express undetectable levels of clumping factor and Protein A2,3,4. It has been shown, however, that these strains possess capsular polysaccharide5. The capsule can mask both Protein A and the clumping factor, thereby, preventing agglutination.
DrySpot Staphytect Plus uses latex particles coated with porcine fibrinogen and rabbit IgG, including specific polyclonal antibodies raised against capsular polysaccharides of S. aureus6,7. When the dried reagents are mixed with a suspension of S. aureus colonies, rapid agglutination occurs through the reaction between (i) fibrinogen and clumping factor, (ii) the Fc portion of IgG and Protein A, (iii) specific IgG and capsular polysaccharide.
Agglutination may also occur with other species which possess clumping factor or Protein A, such as Staphylococcus hyicus and Staphylococcus intermedius. If neither clumping factor, Protein A, or specific capsular polysaccharides are present, agglutination will not occur, and the result will be regarded as negative. The most frequent coagulase and Protein A negative isolates of staphylococci are Staphylococcus epidermidis.
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Specifica
| 2°C to 25°C | |
| DrySpot Staphytect Plus Kit | |
| Pouches containing reaction cards with test and control latex, plastic pouch clip | |
| 120 Tests/Kit |
| Positive | |
| Staphylococcus aureus Test Kit | |
| Latex | |
| Staphylococcus aureus |