MilliporeSigma Contact Plates
MilliporeSigma’s Contact Plates contain Tryptic Soy Agar (TSA) or Sabouraud Dextrose Agar (SDA) or vegetable peptone media of non-animal origin. These plates have excellent adhesion properties and can be used under aerobic, microaerophilic, and anaerobic conditions. Compared to another contact plate, these plates are affordable and highly versatile.
MilliporeSigma’s Contact Plates contain Tryptic Soy Agar (TSA), Sabouraud Dextrose Agar (SDA), or vegetable peptone media of non-animal origin
The bacterial growth medium used in these plates, Tryptic Soy Agar, is not tested on animals because it may harbor animal spongiform encephalopathy (TSE). This is due to the risk of interspecies transmission.
They can be incubated under aerobic, micro-aerophilic or anaerobic conditions
Culture mediums used for contact plates are either aerophilic or aerobic. Anaerobic cultures are often used for the detection of bacteria. Anaerobic cultures are the preferred conditions for a culture of bacterium species that are sensitive to oxygen. Moreover, anaerobic cultures are more likely to produce a lower number of organisms than aerobic cultures.
They adhere better to the surface of the plate
In order to obtain the highest recovery rate, Contact Plates should adhere to the surface of the plate more tightly than other types of driers. A contact plate is made of media that is positioned above the lip of the plate. This media contacts the solid surface of the plate. A non-solid surface can be sampled with a swab. A study was carried out to determine the effect of different adhesives on recovery efficiency.
They are inexpensive
Contact plates are inexpensive tools used for surface microbiological testing. They are composed of agar, a substance mixed with Tryptic Soy Agar, and lecithin. They can capture both high and low counts of microorganisms, making them ideal for surfaces that are clean but contain some contaminants. Contact plates are frequently used in pharmaceutical facilities for the enumeration of microbial contamination of surfaces. Contact plates are reusable, inexpensive, and easy to use.
They are reliable
The recovery rate of Contact Plates was correlated with the wetness of the surfaces. However, contact time might have influenced the results. The researchers choose 10 for the surface contact, which would have improved the recovery rate. However, this would not reflect actual usage. Furthermore, the plate’s surface charge and topography also play a role in bacterial adherence. The present study did not address these issues. Nevertheless, contact plates were considered reliable for low-number Gram-positive microorganisms.
They are versatile
Contact Plates are highly useful in evaluating the contamination of a sanitized surface, particularly in pharmacological applications. The use of these plates requires the neutralization of a wide variety of biocides, which may be in the form of residues on the surface. Contact plates are suitable for use with non-oxidizing active agents, such as quaternary ammonium compounds, bisbiguanides, phenolic, and aldehydes. In contrast, oxidative agents, equivalent to hydrogen peroxide, require much higher concentrations.
