Burt Rodrigues CEO of Biodx gives his insight into sanitisers and their residual efficacy.

“Transmission of COVID-19 is a long way from over. Considering current infection rates are roughly 100 times more than our early days of level 5 lockdown.

“Over the last six months of living with the virus we’ve heard numerous stories of institutions such as schools, hospitals, shops and factories having to close down due to infection. This is often caused by the use of sub-standard disinfecting and sanitising products. But even when the correct products and protocols are in place, can we rely on the people dispensing and using them to do the job properly?

The challenge

“The first issue here is to make sure the products bought do what they advertise. Numerous places have now sold out of ‘authentic disinfecting’ products registered through the NRCS (national Regulator for Compulsory Specifications) or the SABS. Many of the products being sold right now simply don’t come with this type of guarantee. What buyers and managers of companies and government departments must do is if they don’t see these marks then at least the manufacturers must provide laboratory analysis demonstrating the product’s efficacy.

“One of the biggest challenges is around the efficacy claims of chemical compounds. The message to the public has consistently been that the best way of keeping the virus at bay is soap and water which historically has always been the blueprint for good health. In other words, if a surface, whether on skin, a floor or countertop isn’t properly cleaned with detergent or soap and water before disinfecting, the efficacy of the disinfectant or sanitiser is diminished,” explains Rodrigues.

“The same applies to residual efficacy claims (the extended period of kill/destruction of a sanitiser or disinfectant on a surface after being applied), usually from several hours to several days.

The reality

“What this means is that in the case of large areas in particular that need to be regularly disinfected, the responsibility to make sure these areas are now Covid-19 free comes down to the procedures carried out. If a surface is cleaned correctly, in other words, properly cleaned with soap & water or detergent leaving no organic matter behind, followed by an effective disinfectant at 6am, this should allow for up to seven hours of protection.

“It all comes down to elbow grease – the effort that goes into the cleaning process. If for instance a hospital corridor is just swept, the disinfectant when applied will react with the organic material left on the floor and its efficacy immediately eroded, leaving people’s lives endangered. The same goes for other common touch surfaces such as counter tops, lift buttons, ATMs, light switches, door handles etc.,

”The dangers of cutting corners

“If you follow the correct cleaning procedures then 90% of your problem is gone. You’ll often hear excuses such as lack of staff, proper cleaning equipment. What can also happen is that companies will try to save money by cutting back on the right amount of disinfectant to be used. This can lead to a very serious problem. If you lower the concentration and leave even 1% of virus on a surface you’ll create exponential resistance to your next application and in the future have to use a far higher concentration than originally specified to gain the appropriate kill/destroy rate, whilst in the meantime, leaving your staff/public in a highly vulnerable position.

Sanitising your skin

“The same rules apply around efficacy here as with surfaces. You go into a shopping mall, disinfect your hands and feel safe. BUT if your hands weren’t cleaned effectively with soap and water in the first place, meaning the sanitiser is put on top of dirty or moisturised hands, then your safety is far from secure.

The human behaviour factor

“Whether keeping your home, office, factory or yourself virus free, the one constant is human behaviour.

“Be aware that any claims on the pack label of any disinfectant or sanitiser – be they efficacy (bacteria or virus kill/ destroy rate) or residual efficacy (duration of efficacy) - are subject to very specific conditions that usually require some sort of human effort before using.

“So the tools are there. You’ve bought an approved/ registered product. If you use it STRICTLY according to instructions: 100% adherence = 100% result.”

-- ENDS --

About Biodx
Biodx is on a journey to reduce society’s dependence on synthetic chemicals. Harnessing the power of biotechnology, we’re breaking boundaries, crossing new frontiers, and helping to evolve the future of disinfection. All towards enabling a better world.With technical support from the CSIR (Council for Scientific and Industrial Research) as well as financial support from TIA (Technology Innovation Agency) and IDC (Industrial Development Corporation), we’ve spent the last 15 years researching and developing cutting edge antimicrobial and antiviral technologies, proven in field trials to be between 8% and 52% more effective than conventional disinfecting chemicals.Using a natural citrus extract stabilised with an organic biodegradable compound, which contains no chlorine, ethanol or aldehydes. Non-corrosive and earth-friendly, the formulation, rapidly kills 99.999% of many bacteria species and is also effective against viruses.Substantiated by NRCS and SABS SANS (636, 1853) certified, Biodx offers a revolutionary active ingredient for formulators of sanitisers and disinfectants supplying contract cleaning, healthcare/medical, pharmaceutical, food and beverage, retail, manufacturing and agricultural industries.Biodx has applied for EU BPR registration and subsequently had products submitted for testing and verification to stringent EU NEN standards in the Netherlands. Biodx products conform to the above standards.

Issued By: The Lime Envelope
On Behalf Of: Biodx
For Media Information: Kerry Oliver
Telephone: 011 467 9233 / 082 927 9470
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