Risk Analysis and Biocontamination Control – Hygiene Measures in Commercial Laundries / M. Heintz in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 44, N° 5/2007 (10-11/2007)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 44, N° 5/2007 (10-11/2007) . - p. 274-280 Titre : Risk Analysis and Biocontamination Control – Hygiene Measures in Commercial Laundries Type de document : texte imprimé Auteurs : M. Heintz, Auteur ; J. Krämer, Auteur ; L. Vossebein, Auteur Année de publication : 2007 Article en page(s) : p. 274-280 Note générale : Bibliogr. Langues : Anglais (eng) Tags : RABC  HACCP  Textiles  Laundry  Hygiene Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : The requirements for general and hygienic cleanliness are steadily increasing. Therefore the textiles used in food industry as well as in other hygienically demanding areas have to fulfil certain hygiene standards. The assurance of these microbiological quality is of increasing significance. National and international standards, guidelines as well as laws in some European countries ask for a professional reprocessing and advise clearly against washing the laundry in households. In commercial laundries the implementation of EN 14065 "Laundry Processed Textiles – Risk Analysis and Biocontamination Control System" (RABC system) ensures a defined microbiological quality of processed textiles. EN 14065 is published as a European standard and offers a powerful technique to perform a risk analysis and with it achieve any constant microbiological quality of expedition textiles. However, it does not contain any microbiological limits. This paper focuses on microbiological limits and hygiene instructions in laundry processes to fulfil the requirements of hygienically demanding areas such as food industry. Therefore hundreds of microbiological samples were taken at relevant process steps in nine laundries before and after installation of the RABC system. Samples were taken from wet and dry textiles, textile close surfaces and the interior of hands of the employees. Additionally water samples were analysed and the disinfection effect of washing procedures was investigated with biomonitors containing Staphylococcus aureus and Enterococcus faecium. The results show that the RABC system can constantly improve and guarantee the hygienic quality of the expedition textiles. Laundries with RABC system can easily fulfil the needs of hygienically demanding areas like food industry. Limit and/or orientation values for almost all relevant process steps as well as recommendations for sampling are set up. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3203 [article]

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Use of Biomonitors for the Validation of Chemo-thermal Disinfecting Washing Procedures / G. Kagemann in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 45, N° 6/2008 (11-12/2008)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 45, N° 6/2008 (11-12/2008) . - p. 334-339 Titre : Use of Biomonitors for the Validation of Chemo-thermal Disinfecting Washing Procedures Type de document : texte imprimé Auteurs : G. Kagemann, Auteur ; B. Hilgenberg, Auteur ; J. Rech, Auteur ; M. Heintz, Auteur ; L. Vossebein, Auteur Année de publication : 2008 Article en page(s) : p. 334-339 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Désinfection Détergents Diffusion (physique) Membranes (technologie) Tags : Biomonitor  Semipermeable Résumé : The aim of this study was to investigate the advantages and disadvantages of different commercially available biomonitors for the validation of chemo-thermal disinfecting washing procedures in textile service enterprises. In the course of quality management systems (e.g. acc. to EN 14065: Risk Analysis and Biocontamination Control System, RABC-System) the performance of disinfecting washing procedures has to be controlled and validated periodically by the use of biomonitors. Biomonitors (typically small cotton fabrics) are loaded with bacteria and often encapsulated in semipermeable membranes. The following types of biomonitors are commercially available: a) "open design", fabrics soaked with blood and bacteria enclosed in textile bags, b) monitors with bacteria enclosed in a semipermeable membrane and c) monitors surrounded by a semipermeable membrane and covered with a hard plastic surface. The membranes should avoid bacterial contamination of the textiles and environment because bacteria are too large to pass the membrane. It is commonly accepted in practice that liquids, proteins and disinfecting agents can diffuse through the membrane. However, big differences in the germ reductions measured with different biomonitors were detected, depending on their individual design. Therefore the diffusion properties of several detergent ingredients were quantified by using semipermeable membranes. It is demonstrated that proteins and even active oxygen species, are retained by these membranes and are thus not able to kill or inactivate bacteria inside the monitors. Hence the use of biomonitors with membranes should be reconsidered, because they are mainly able to detect thermal disinfection, but barely react to the chemical part of chemo-thermal disinfection procedures. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2832 [article]

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