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Thermo Scientific™ Staphytect Plus™ Latex Agglutination Test
Rapidly identify and differentiate Staphylococcus aureus by detecting clumping factor, Protein A, and certain capsular polysaccharides.
Brand: Thermo Scientific™ DR0850B
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Description
Rapidly identify and differentiate Staphylococcus aureus with Thermo Scientific™ Staphytect Plus™ Latex Agglutination Test. 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 those staphylococci that do not possess these properties.
Staphytect Plus Latex Agglutination Test uses blue latex particles coated with porcine fibrinogen and rabbit IgG for detection of clumping factor, protein A and capsular polysaccharides of S. aureus.
- 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 Staphylococcus aureus possess both bound coagulase and extracelluar staphylocoagulase. Protein A is found on the cell surface of about 95% of human strains of Staphylococcus 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 all possess capsular polysaccharide5. The capsule can mask both Protein A and the clumping factor, thereby preventing agglutination.
Staphytect Plus uses blue latex particles coated with porcine fibrinogen and rabbit IgG, including specific polyclonal antibodies raised against capsular polysaccharides of S. aureus 6,7.
When the reagent is mixed on a card with colonies of S. aureus, 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 clumping factor, Protein A, or specific capsular polysaccharides are not 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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Specifications
| 2°C to 8°C | |
| Staphytect Plus | |
| Test latex, control latex, disposable reaction cards | |
| 500 Tests/Kit |
| Positive | |
| Staphylococcus aureus Test Kit | |
| Latex | |
| Staphylococcus aureus |