Neutralizing buffer swabs are used in the monitoring of surfaces for total bacterial count. Neutralizing buffer inactivates the bactericidal and bacteriostatic effects of chlorine and quaternary ammonium detergents.
However, neutralizing buffer exhibits no toxic effects on microorganisms. This permits the transfer of swabbed organisms to the laboratory without loss in viability. Neutralizing buffer is not designed to culture and enumerate microorganisms.
The SwabCheck principle
The surface is wiped with a cellulose swab and any bacteria collected are transferred via the swab into a tube containing a special medium with an indicator dye, which is then incubated. A single bacterium is sufficient to cause a color change. This means that SwabCheck is about 1000 times more sensitive than the conventional ATP method. This accuracy is particularly important in the food industry. With this simple method, it is possible to identify microorganisms such as Listeria monocytogenes, which must not be present in any concentration in food and beverages.
- The right test for each type of contamination
- Qualitative and semi-quantitative hygiene control
- Sterile packed and ready-for-use
- Easy to handle
- Rapid results
- Long shelf-life
Quality Control and Recommended Incubation Conditions
Positive control: Undertaken on cultured organisms after transfer to standard methods agar plates from neutralizing buffer.
Escherichia coli ATCC 25922, incubated at 35ºC for 24 hours.
Negative control: Not undertaken.
Sterility test: 7 days plated sterility test.
Per liter of water adjusted to pH 7.2 ± 0.5
Sodium thiosulfate 160 mg
Aryl sulfonate complex 5.0 g
|Swabs w/ medium, 4ml (125 un)||10498303||***|
|Swabs w/ medium, 4 ml (500 un)||10498304||***|
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