Evidence & Efficacy Library
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Evidence Before Marketing
At KORRA, we believe disinfectant claims should be supported by evidence.
The technology utilised within KORRA HygienTabs™ has undergone extensive independent testing against recognised European and British Standards (EN and BS EN) to evaluate efficacy against a broad range of microorganisms under both clean and dirty conditions.
To date, the technology has been evaluated through more than 70 microbiological tests covering:
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Bacteria
-
Viruses
-
Yeast
-
Fungi
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Mycobacteria
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Bacterial spores
Testing has been performed by independent accredited laboratories and research partners including:
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University College London Hospitals (UCLH)
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MSL
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BluTest
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IRM
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AA
This page provides an overview of the efficacy data supporting the technology behind KORRA HygienTabs™.
Why This Matters
Not all microorganisms are equally difficult to eliminate.
Some bacteria and viruses can be controlled relatively easily, while others require significantly higher levels of antimicrobial activity.
Particularly challenging organisms include:
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MRSA
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Pseudomonas aeruginosa
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Candida auris
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Adenovirus
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Parvovirus
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Mycobacteria
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Clostridioides difficile spores
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Bacillus spores
These organisms are routinely used during laboratory testing because they represent demanding microbial challenges.
Demonstrating efficacy against highly resistant microorganisms provides confidence in a disinfectant’s overall performance.
Understanding PPM (Parts Per Million)
Throughout this Evidence & Efficacy Library, you will see disinfectant concentrations expressed as ppm.
PPM stands for “Parts Per Million” and is used to describe the concentration of active disinfectant present within a solution.
In simple terms, ppm tells us how much active disinfectant is available in the prepared solution.
A higher ppm means a higher concentration of active disinfectant.
However, a higher ppm does not automatically mean a better disinfectant.
The effectiveness of a disinfectant depends on several factors working together, including:
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The active ingredient
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The concentration (ppm)
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The contact time
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The microorganism being tested
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Whether testing was conducted under clean or dirty conditions
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The log reduction achieved
For example, a highly effective disinfectant may achieve the same microbial reduction at 1,000 ppm that another disinfectant may only achieve at 5,000 ppm.
This is why concentration should never be viewed in isolation.
The full test result should always be considered.
Typical Concentrations Evaluated
|
Concentration |
Typical Application |
|---|---|
|
800 ppm |
Broad-spectrum efficacy testing |
|
1,000 ppm |
Standard disinfection testing |
|
2,000 ppm |
Enhanced sporicidal testing |
|
Higher concentrations |
Specialist challenge and research testing |
Different microorganisms require different challenge conditions and testing protocols, which is why multiple concentrations appear throughout this library.
Independent Research & Development
The technology behind KORRA HygienTabs™ has been investigated alongside healthcare microbiology specialists and researchers, including Professor Peter Wilson and the microbiology department at University College London Hospitals (UCLH).
Particular focus has been placed on bacterial spores due to their exceptional resistance to conventional disinfectants.
Researchers specifically selected spores because:
-
They represent a genuine infection-control challenge within healthcare environments.
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They are among the most resistant microorganisms used in disinfectant testing.
If a disinfectant demonstrates efficacy against bacterial spores, it provides strong evidence of broad-spectrum antimicrobial capability.
Bactericidal Efficacy
EN 1276
|
Organism |
Concentration |
Contact Time |
Conditions |
Result |
|---|---|---|---|---|
|
Acinetobacter baumannii |
800 ppm |
1 minute |
Dirty |
7.48 log |
|
MRSA |
800 ppm |
1 minute |
Clean |
7.34 log |
|
Pseudomonas aeruginosa |
800 ppm |
1 minute |
Clean |
7.65 log |
|
Klebsiella pneumoniae |
800 ppm |
1 minute |
Clean |
7.59 log |
|
Enterococcus hirae |
800 ppm |
5 minutes |
Dirty |
5.28 log |
|
Escherichia coli |
800 ppm |
5 minutes |
Dirty |
5.32 log |
|
Staphylococcus aureus |
800 ppm |
5 minutes |
Dirty |
5.25 log |
EN 13697 Surface Testing
|
Organism |
Concentration |
Contact Time |
Conditions |
Result |
|---|---|---|---|---|
|
Staphylococcus aureus |
1000 ppm |
5 minutes |
Dirty |
6.91 log |
|
Enterococcus hirae |
1000 ppm |
5 minutes |
Dirty |
6.68 log |
|
Escherichia coli |
1000 ppm |
5 minutes |
Dirty |
6.28 log |
|
Pseudomonas aeruginosa |
1000 ppm |
5 minutes |
Dirty |
6.20 log |
Additional Bactericidal Testing
|
Organism |
Standard |
Concentration |
Contact Time |
Result |
|---|---|---|---|---|
|
Legionella pneumophila |
EN 13623 |
800 ppm |
60 minutes |
4.19 log |
|
Enterococcus hirae |
EN 13727 |
800 ppm |
5 minutes |
5.25 log |
Instrument Disinfection Efficacy
Instrument disinfection testing is particularly relevant for nail, beauty and podiatry professionals because it evaluates disinfectant performance on contaminated carriers designed to simulate reusable instruments.
Unlike suspension tests, where microorganisms are freely suspended in liquid, carrier tests require microorganisms to be attached to a surface before exposure to the disinfectant. This provides a more realistic assessment of how a disinfectant may perform during instrument processing.
For professionals using reusable instruments such as e-file bits, nippers, scissors, pushers and curettes, carrier testing provides valuable evidence that the disinfectant technology is suitable for instrument disinfection applications.
EN 14561
|
Organism |
Concentration |
Contact Time |
Conditions |
Result |
|---|---|---|---|---|
|
Enterococcus hirae |
1000 ppm |
5 minutes |
Dirty |
>5.85 log |
|
Enterococcus hirae |
2000 ppm |
5 minutes |
Dirty |
>5.85 log |
|
Pseudomonas aeruginosa |
1000 ppm |
5 minutes |
Dirty |
>5.03 log |
|
Pseudomonas aeruginosa |
2000 ppm |
5 minutes |
Dirty |
>5.03 log |
|
Staphylococcus aureus |
1000 ppm |
5 minutes |
Dirty |
>5.96 log |
|
Staphylococcus aureus |
2000 ppm |
5 minutes |
Dirty |
>5.96 log |
Virucidal Efficacy
EN 14476
|
Organism |
Concentration |
Contact Time |
Conditions |
Result |
|---|---|---|---|---|
|
Feline Coronavirus (Coronavirus surrogate) |
500 ppm |
1 minute |
Dirty |
>4 log |
|
Feline Coronavirus (Coronavirus surrogate) |
1000 ppm |
30 seconds |
Dirty |
>4 log |
|
Feline Coronavirus (Coronavirus surrogate) |
1000 ppm |
1 minute |
Dirty |
>4 log |
|
Feline Coronavirus (Coronavirus surrogate) |
2000 ppm |
30 seconds |
Dirty |
4 log |
|
Feline Coronavirus (Coronavirus surrogate) |
2000 ppm |
1 minute |
Dirty |
>4 log |
|
Adenovirus Type 5 |
800 ppm |
5 minutes |
Dirty |
5.38 log |
|
Canine Parvovirus |
2000 ppm |
5 minutes |
Clean |
5.33 log |
|
Canine Parvovirus |
2000 ppm |
15 minutes |
Clean |
6.83 log |
EN 14675
|
Organism |
Concentration |
Contact Time |
Result |
|---|---|---|---|
|
Feline Calicivirus |
2000 ppm |
5 minutes |
4 log |
|
Feline Calicivirus |
4000 ppm |
5 minutes |
4.67 log |
|
Feline Calicivirus |
6000 ppm |
5 minutes |
4.67 log |
Fungicidal & Yeasticidal Efficacy
EN 1650
|
Organism |
Concentration |
Contact Time |
Conditions |
Result |
|---|---|---|---|---|
|
Candida auris |
2000 ppm |
30 seconds |
Dirty |
4.26 log |
EN 13624
|
Organism |
Concentration |
Contact Time |
Conditions |
Result |
|---|---|---|---|---|
|
Candida albicans |
800 ppm |
5 minutes |
Dirty |
>4.46 log |
|
Candida albicans |
1600 ppm |
5 minutes |
Dirty |
>4.46 log |
|
Aspergillus brasiliensis |
3200 ppm |
15 minutes |
Dirty |
4.42 log |
EN 14562
|
Organism |
Concentration |
Contact Time |
Conditions |
Result |
|---|---|---|---|---|
|
Candida albicans |
1000 ppm |
5 minutes |
Dirty |
4.46 log |
|
Candida albicans |
1000 ppm |
15 minutes |
Dirty |
4.64 log |
|
Aspergillus brasiliensis |
4000 ppm |
15 minutes |
Dirty |
4.08 log |
Mycobactericidal Efficacy
EN 14204
|
Organism |
Concentration |
Contact Time |
Conditions |
Result |
|---|---|---|---|---|
|
Mycobacterium avium |
1000 ppm |
60 minutes |
Dirty |
6.13 log |
|
Mycobacterium terrae |
1000 ppm |
60 minutes |
Dirty |
6.19 log |
Sporicidal Efficacy
Bacterial spores are among the most resistant forms of microbial life.
Unlike many bacteria and viruses, spores are specifically designed to survive drying, chemical exposure and environmental stress.
For this reason, sporicidal efficacy is often regarded as one of the most demanding measures of disinfectant performance.
Latest BS EN 17126:2018 Results
Recent testing demonstrated validated sporicidal efficacy at standard-use concentration under dirty conditions.
|
Organism |
Concentration |
Contact Time |
Conditions |
Result |
|---|---|---|---|---|
|
Clostridioides difficile |
1000 ppm |
5 minutes |
Dirty |
>4 log |
|
Bacillus subtilis |
1000 ppm |
5 minutes |
Dirty |
>4 log |
|
Bacillus cereus |
1000 ppm |
5 minutes |
Dirty |
>4 log |
This is particularly significant because BS EN 17126 is a medical-area sporicidal standard specifically designed to evaluate disinfectants against highly resistant bacterial spores.
Additional Sporicidal Testing
EN 13704
|
Organism |
Concentration |
Contact Time |
Conditions |
Result |
|---|---|---|---|---|
|
Clostridioides difficile |
2000 ppm |
5 minutes |
Dirty |
>4.41 log |
ASTM E2197
|
Organism |
Concentration |
Contact Time |
Conditions |
Result |
|---|---|---|---|---|
|
Clostridioides difficile |
3567 ppm |
2 minutes |
Dirty |
4.5 log |
|
Clostridioides difficile |
5166 ppm |
2 minutes |
Dirty |
6.2 log |
|
Clostridioides difficile |
5166 ppm |
5 minutes |
Dirty |
6.55 log |
UCLH Research Findings
Research conducted with University College London Hospitals investigated efficacy against highly resistant Clostridioides difficile spores under demanding conditions.
|
Organism |
Concentration |
Contact Time |
Conditions |
Result |
|---|---|---|---|---|
|
C. difficile spores |
800 ppm |
1 minute |
Clean |
3.75 log |
|
C. difficile spores |
800 ppm |
5 minutes |
Clean |
4.16 log |
|
C. difficile spores |
800 ppm |
15 minutes |
Clean |
7.33 log |
Additional UCLH testing demonstrated:
|
Organism |
Concentration |
Contact Time |
Result |
|---|---|---|---|
|
MRSA |
800 ppm |
1 minute |
7.34 log |
|
Pseudomonas aeruginosa |
800 ppm |
1 minute |
7.65 log |
|
Klebsiella pneumoniae |
800 ppm |
1 minute |
7.59 log |
|
Acinetobacter baumannii |
800 ppm |
1 minute |
7.48 log |
These results demonstrate exceptionally high levels of microbial reduction against a range of clinically significant challenge organisms.
Summary Of Efficacy
The technology utilised within KORRA HygienTabs™ has demonstrated efficacy against:
Bacteria
-
MRSA
-
Pseudomonas aeruginosa
-
Escherichia coli
-
Staphylococcus aureus
-
Enterococcus hirae
-
Klebsiella pneumoniae
-
Acinetobacter baumannii
-
Legionella pneumophila
Viruses
-
Coronavirus surrogates
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Adenovirus
-
Parvovirus
-
Calicivirus
Yeast & Fungi
-
Candida albicans
-
Candida auris
-
Aspergillus brasiliensis
Mycobacteria
-
Mycobacterium avium
-
Mycobacterium terrae
Bacterial Spores
-
Clostridioides difficile
-
Bacillus subtilis
-
Bacillus cereus
Our Commitment To Transparency
At KORRA, we believe professionals deserve access to evidence, not just marketing claims.
The technology behind KORRA HygienTabs™ continues to be evaluated through recognised testing standards, independent laboratories and real-world professional use.
Because professional hygiene should always be built on evidence, transparency and trust.