NRS II Transwabs® are sampling swabs premoistened with a neutralising solutions. Surfaces which have been recently cleaned may still have traces of antimicrobial substances, such as disinfectants which would kill any bacteria picked up in a sample, and so prevent them being detected. The neutralisers in NRS II cancel these antimicrobial activities, allowing the microbes present to survive and be detected.

NRS II Transwabs® are supplied with a choice of accurate fill volumes to allow quantitative measurements of the environmental bioburden, so that any changes or trends can be quickly identified. The collected samples can also be tested for particular pathogens.

Polywipes™ are premoistened blue sponge swabs that allow the sampling of larger areas, such as machines, conveyor belts, floors and walls. The sponges are premoistened with a phosphate buffer that also effectively neutralises trace antimicrobials, this time by rapid dilution.

By regularly swabbing on defined areas and quantifying the microbial load, changes or trends can be monitored and responded to. Pathogens can also be detected if present. Polywipes™ have also been used in clinical environments for the detection of reservoirs of healthcare associated pathogens such as Clostridium difficile.

Medical Wire also has some swab products for the detection of particular pathogens such as coliforms. The Coliform Isolation Transwab® will detect coliforms including E. coli on surfaces, and is an effective way of monitoring personal hygiene in food manufacturing premises.

For example door handles can be swabbed. The swab is placed in the purple medium which is then incubated overnight (or up to 24 hours). Any coliforms present will multiply, causing the medium to turn yellow. Other products are available for the detection of Listeria, and for general hygiene.