Disinfection

Professional disinfection product: standard dilution and contact time

Disinfection is essential:

Hygiene is the set of principles and practices aimed at preserving and improving health.
Disinfection and the use of disinfectant products is one of the keys to guaranteeing perfect hygiene.
The application of hygiene rules has an essential place in the prevention of transmissible diseases in the community to combat sources of contamination and reduce routes of transmission.
Numerous studies have shown the impact of good hygiene habits on life expectancy.
Maintenance measures for objects, surfaces and premises are therefore very important.
These measures are effective in reducing the transmission of infections, provided that the products, their use and the frequency of maintenance are adequate. Bacteria, fungi, yeasts, viruses are observed on all surfaces, on the skin, in the air.

Viruses, bacteria, fungi, yeasts...small organisms but big impacts!

• They are not all transmitted in the same way, but all can be responsible for serious health crises. Thus Viruses such as H1N1, H5N1, flu, gastro epidemics, Strass, Mers and more recently Covid19 have demonstrated their harmful capacities on our Societies.
• Their development is extremely rapid: a single bacterial cell generates a colony of 8 million bacteria in less than 24 hours.
• Prevention of contamination risks can only be done through good hygiene practices and effective disinfection.

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Disinfection standards for professional products

Disinfection standards are presented according to a classification:
Core Standards – Phase 1
Application standards - Phase 2 separated into 2 stages 1 and 2
Phase 1 standards: NF EN14347 / NF T 72-230 / NF T 72-231
Phase 2 standards, step 1: NF EN1276 / NF EN1650 / NF EN13624 / NF EN13727 / NF EN14348 / NF EN14348
Phase 2 standards, step 2: NF EN1500 / NF EN12791 / NF EN13697 / NF EN14561 / NF EN14562 / NF EN14563 / NF EN16615 / NF EN16615 / NF EN17111 / NF EN16777

Disinfectant product and EN14476 standard

Since the appearance of the Covid19 virus which is an enveloped virus, the standard put forward for the fight against Covid19 is EN14476.
A standard lives and evolves over time.
Previous versions of the EN 14476 standard (2007, 2013 and 2015) did not distinguish between non-enveloped (naked) and enveloped viruses for the treatment of surfaces and hands.
Since non-enveloped viruses are more resistant, the reasoning was that if non-enveloped viruses are destroyed then enveloped viruses are as well.

History of modifications to the EN 14476 standard:
EN 14476+A1 (2007): Poliovirus and Adenovirus test; Parvovirus for chemothermal disinfection.
EN 14476 (2013): addition of Norovirus as a reference strain, addition of limited spectrum virucidal activity on Adenovirus and Norovirus only for the treatment of hands, possibility of testing a ready-to-use product at 97% instead of 80% previously.
EN 14476+A1 (2015): addition of activity on enveloped viruses with testing on Vaccinia virus only for hand disinfection.
EN 14476+A2 (2019): Virucidal activity on enveloped viruses (hands and surfaces) = test on Vaccinia virus
Limited spectrum virucidal activity (on enveloped viruses + non-enveloped viruses Adenovirus, Rotavirus and Norovirus) = test on Adenovirus and Norovirus
Virucidal activity (enveloped and non-enveloped viruses) = test on Poliovirus, Adenovirus and Norovirus
It is mentioned in the standards protocols that tests carried out on previous versions of the standards remain valid and must not be resubmitted for testing.

Regulations on disinfectants and the Biocide directive
Household disinfectants are part of the large “Biocides” family:
Biocidal products being preparations of “active substances” for domestic or industrial use intended to destroy, repel or render harmless harmful organisms, to prevent their action or to prevent them.
fight, by chemical or biological action.
The “active substance” present in the biocidal product may be a chemical compound or come from a micro-organism exerting its biocidal action on or against harmful organisms.
Regulatory obligation: You will find the “active substance(s)” on the label in the composition
of any disinfectant product with its identification number (CAS number) and concentration in % by weight.
Active substances and biocidal products are subject to a European regulation (EU Regulation No. 528/2012) aimed at harmonizing the marketing and use of these products in Europe .

In the Disinfectants Group, there are 5 types of products (TP):
TP1 Biocidal products intended for human hygiene;
Not affected: skin antiseptic products and cosmetic products
TP2 Disinfectants and algicidal products not intended for direct application to humans or animals
These are products intended to disinfect surfaces, materials, equipment and furniture that are not used in direct contact with food or animal feed.
It can also be products intended to disinfect air, water not used for human or animal consumption, chemical toilets, wastewater, hospital waste and soil.
TP3 Biocidal products intended for veterinary hygiene.
TP4 Disinfectants for surfaces in contact with food and animal feed.
TP5 Disinfectants for drinking water.
Regulatory obligation: you will find on the label of any disinfectant product the TP(s) to which it belongs.

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