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Chemex AntiBak Test Results | Pathogen | Minimum
Log Reduction | International
Approvals | Dilution
(%) | | Virus | | | | | Adenovirus | > 4.0 | EN 14476 | 0.5 | | Polio | > 4.0 | EN 14476 | 1 | | FCV Norovirus | >5.4 | GCU | 0.5 | | Hepatitis C | PASS | GCU | 1.0% | | HIV | PASS | GCU | 1.0% | | SARS | > 3.37** | GCU | 0.5% | | Bacteria | | | | | Mycobacterium avium | > 3.0** | EN 1276 | 0.5 | | Campylobacter jejuni | > 6.11 | EN 1276 | 1 | | Clostridium difficile (vegetative) | > 5.45 | EN 1276 | 1 | | Enterococcus hirae | > 6.00 | EN 1276 | 1 | | Escherichia coli | > 6.04 | EN 1276 | 1 | | Listeria moncytogenes | > 6.10 | EN 1276 | 1 | | Proteus vulgaris | > 6.36 | EN 1276 | 1 | | Pseudomonas aeruginosa | > 6.49 | EN 1276 | 1 | | Staphylococcus aureus | > 6.17 | EN 1276 | 1 | | Fungi | | | | | 1Aspergillus niger | > 5.61 | EN 1650 | 1 | | Candida albicans | > 5.85 | EN 1650 | 1 | | Spores | | | | | Bacillus subtilis | PASS | EN 13704 | 1.5 | | Clostridium difficile | > 5.55 | EN 1276 | 1 | | Clostridium difficile | PASS | EN 13704 | 1.5 | | Clostridium perfringens | > 5.25 | EN 1276 | 1 | | Veterinary Approvals | | | Dilution ratio | | Foot & Mouth Disease | PASS | UK - DEFRA* | 1:1300 | Avian Flu H5N1
(Newcastle Disease) | PASS | UK - DEFRA* | 1:300 | Salmonella choleraesius
(General Orders UK DEFRA) | PASS | UK - DEFRA* | 1:80 |
* UK - DEFRA: Department for Environment, Food and Rural Affairs.
** Limited by culture. Limitations To The Minimum Log Reduction - For Viruses The log reduction value obtainable for viruses depends on the actual starting titre achievable for that virus. In standard tests, such as EN 14476, the virus strains are selected to be grown up to high titres (i.e. poliovirus 1 can be grown to > 1 x 109 TCID50 units and Adenovirus 5 can be grown to >1 x 1011 TCID50 units).
However, many viruses cannot be grown to such high titres, thus not enabling a 4 Log reduction to be achieved. Assay sensitivity is also compromised by the requirement to neutralise residual disinfectant action by dilution of the virus/disinfectant suspension. Viral log reductions of 3 are set in some standards for this reason (e.g. this is acceptable to the US Environmental Protection Agency), and these are recorded as a minimum log reduction. 1 Aspergillus niger EN 1650 Pass rate is a Log 4 reduction for fungi.
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