29 research outputs found

    Efficacy of five ‘sporicidal’ surface disinfectants against Clostridioides difficile spores in suspension tests and 4-field tests

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    Background: A sporicidal surface disinfection is recommended both for the outbreak and the endemic setting but a comparative evaluation on the efficacy of ‘sporicidal’ surface disinfectants using suspension tests and 4-field tests has not been performed. Aim: To determine the efficacy of five ‘sporicidal’ surface disinfectants (three ready-to-use wipes (A, B, E), two concentrates (C, D) based on peroxides or aldehydes against C. difficile spores. Methods: The efficacy was determined under clean conditions using a suspension test and the 4-field test. Each test was performed in duplicate in two separate laboratories. Wipes were wrung to collect the solution for the suspension tests. Results: Product A (peracetic acid; 5 min), product C (peracetic acid; 2% solution in 15 min or 1% solution in 30 min) and product D (peracetic acid; only 2% solution in 15 min) were effective with at least a 4 log10-reduction of C. difficile spores in suspension and on surfaces. Product B (hydrogen peroxide) was not effective in suspension (0.9 log10 after 15 min; 3.2 log10 after 1 h) and on surfaces (2.8 log10 after 15 and 60 min). Product E based on glutaraldehyde, (ethylendioxy)dimethanol and DDAC demonstrated 0.9 log10 after 4 h in suspension and 4.5 log10 after 4 h on surfaces. Conclusions: Not all surface disinfectants with a sporicidal claim were effective against C. difficile spores in standardized suspension tests and in the 4-field test. In clinical practice preference should be given to products that reliably pass the efficacy criteria of both types of tests.Peer Reviewe

    Impact of a silver layer on the membrane of tap water filters on the microbiological quality of filtered water

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    <p>Abstract</p> <p>Background</p> <p>Bacteria in the hospital's drinking water system represent a risk for the acquisition of a nosocomial infection in the severely immunocompromised host. Terminal tap water filters may be used to prevent nosocomial Legionnaires' disease. We present data from water samples using an improved kind of tap water filters.</p> <p>Methods</p> <p>In a blinded study on an intermediate care unit of the thoracic surgery department, a modified type of the Germlyser water filter (Aqua-Free Membrane Technology) with a newly-introduced silver layer on the filtration membrane was compared to its preceding type without such a layer on 15 water outlets. We determined growth of <it>Legionella</it>, other pathogenic bacteria, and the total heterotrophic plate count in unfiltered water and filtered water samples after filter usage intervals of 1 through 4 weeks.</p> <p>Results</p> <p>A total of 299 water samples were tested. Twenty-nine of the 60 unfiltered water samples contained <it>Legionella </it>of various serogroups (baseline value). In contrast, all samples filtered by the original water filter and all but one of the water samples filtered by the modified filter type remained <it>Legionella</it>-free. No other pathogenic bacteria were detected in any filtered sample. The total plate count in water samples increased during use of both kinds of filters over time. However, for the first 7 days of use, there were significantly fewer water samples containing >100 CFU per mL when using the new filter device compared with the older filters or taps with no filter. No advantage was seen thereafter.</p> <p>Conclusion</p> <p>The use of this type of terminal water filter is an appropriate method to protect immunocompromised patients from water-borne pathogens such as <it>Legionella</it>.</p

    Mund- und Rachentherapeutika

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    Mikrobiologische QualitÀt von Trinkwasser in Risikobereichen

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    Chemische Desinfektion in Gesundheitseinrichtungen: Kritische Aspekte fĂŒr die Entwicklung einer globalen Strategie

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    Chemical disinfection is an indispensable means of preventing infection. This holds true for healthcare settings, but also for all other settings where transmission of pathogens poses a potential health risk to humans and/or animals. Research on how to ensure effectiveness of disinfectants and the process of disinfection, as well as on when, how and where to implement disinfection precautions is an ongoing challenge requiring an interdisciplinary team effort. The valuable resources of active substances used for disinfection must be used wisely and their interaction with the target organisms and the environment should be evaluated and monitored closely, if we are to reliable reap the benefits of disinfection in future generations. In view of the global threat of communicable diseases and emerging and re-emerging pathogens and multidrug-resistant pathogens, the relevance of chemical disinfection is continually increasing. Although this consensus paper pinpoints crucial aspects for strategies of chemical disinfection in terms of the properties of disinfectant agents and disinfection practices in a particularly vulnerable group and setting, i.e., patients in healthcare settings, it takes a comprehensive, holistic approach to do justice to the complexity of the topic of disinfection.Die chemische Desinfektion ist ein unverzichtbares Mittel zur InfektionsprĂ€vention. Dies gilt fĂŒr das Gesundheitswesen, aber auch fĂŒr alle anderen Bereiche, in denen die Übertragung von Krankheitserregern ein potenzielles Gesundheitsrisiko fĂŒr Mensch und/oder Tier darstellt. Zu erforschen, wie die Wirksamkeit von Desinfektionsmitteln und des Desinfektionsprozesses sichergestellt werden kann und wann, wie und wo Desinfektionsmaßnahmen durchzufĂŒhren sind, ist eine stĂ€ndige Herausforderung, die eine interdisziplinĂ€re Teamarbeit erfordert. Die wertvollen Ressourcen der fĂŒr die Desinfektion verwendeten Wirkstoffe mĂŒssen klug genutzt werden und ihre Wechselwirkung mit den Zielorganismen und der Umwelt sollte genau bewertet und ĂŒberwacht werden, wenn wir die Vorteile der Desinfektion in zukĂŒnftigen Generationen zuverlĂ€ssig nutzen wollen. Angesichts der globalen Bedrohung durch ĂŒbertragbare Krankheiten sowie durch neu- und wiederauftretende Krankheitserreger und multiresistente Erreger nimmt die Bedeutung der chemischen Desinfektion stĂ€ndig zu. Dieses Konsensuspapier befasst sich vor allem mit den entscheidenden Aspekten fĂŒr Strategien der chemischen Desinfektion im Hinblick auf die Eigenschaften von Desinfektionsmitteln und Desinfektionspraktiken in einer besonders gefĂ€hrdeten Gruppe und Umgebung, nĂ€mlich bei Patienten in Einrichtungen des Gesundheitswesens, jedoch verfolgt es dabei auch einen umfassenden, ganzheitlichen Ansatz, um der KomplexitĂ€t des Themas Desinfektion gerecht zu werden

    Ein europÀischer Ansatz zur InfektionsprÀvention und -kontrolle

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    The current pandemic caused by COVID-19 has underlined the importance of a joint effort and approach to ensure patient and health care worker safety in medical care throughout Europe. In addition, the recent flood disasters in Germany and other countries called for immediate joint action, in this case with regard to the prevention of water-borne infections. Environmental disasters will increase with consequences for hospitals and nursing homes. Cooperative efforts are needed for preventing and controlling associated infection outbreaks, new pathogens will appear and a geographic shift of infectious diseases previously not detected in certain areas has already been observed.This approach to infection prevention and control must entail structural as well as regulatory aspects. The principle of equal protection against infections in all European countries must be implemented. Prevention and control of infections, including nosocomial infections, infections caused by antibiotic-resistant bacteria as well as pandemics, need to be based on equal standards in all of Europe.Protection against infections and other public health risks in all European countries is the best guarantor for building trust and identification of citizens in our common Europe. Experts in the fields of hygiene, microbiology, infectiology and epidemiology have to pool the expertise on the prevention and control of infections from different European countries and define key targets for achieving a high standard of hygiene measures throughout Europe. The participants of the Rudolf SchĂŒlke Foundation International Symposium call for immediate action and priority to be given to the realization of the proposed 16-point plan.Die aktuelle COVID-19-Pandemie hat deutlich gemacht, wie wichtig gemeinsame Anstrengungen und ein gemeinsames Vorgehen sind, um die Sicherheit von Patienten und Mitarbeitenden in der medizinischen Versorgung in ganz Europa zu gewĂ€hrleisten. Auch die jĂŒngsten Hochwasserkatastrophen in Deutschland und anderen LĂ€ndern haben gezeigt, dass sofortige ĂŒberregionale Maßnahmen, in diesem Fall zur PrĂ€vention von durch Wasser ĂŒbertragenen Infektionen, dringend erforderlich sind. Umweltkatastrophen werden zunehmen, und sie haben auch fĂŒr KrankenhĂ€user und Pflegeheime Folgen.AusbrĂŒche mĂŒssen verhindert und unter Kontrolle gebracht werden. Zugleich ist mit dem Auftreten neuer Krankheitserreger sowie mit einer bereits jetzt zu beobachtenden geographischen Verschiebung von Infektionskrankheiten zu rechnen.Der Ansatz zur PrĂ€vention und BekĂ€mpfung von Infektionskrankheiten muss sowohl strukturelle als auch politische Aspekte beinhalten. Es gilt, den Grundsatz des gleichen Schutzes vor Infektionen in allen europĂ€ischen LĂ€ndern umzusetzen. PrĂ€vention und BekĂ€mpfung von Infektionen, einschließlich nosokomialer Infektionen, Infektionen durch antibiotikaresistente Bakterien sowie Pandemien, mĂŒssen in ganz Europa auf den gleichen Standards beruhen.Der Schutz vor Infektionen und anderen Risiken fĂŒr die öffentliche Gesundheit in allen LĂ€ndern Europas ist der beste Garant fĂŒr die Schaffung von Vertrauen und Identifikation der BĂŒrger in unserem gemeinsamen Europa. Expertinnen und Experten auf den Gebieten der Hygiene, Mikrobiologie, Infektiologie und Epidemiologie mĂŒssen ihre Expertise zur PrĂ€vention und BekĂ€mpfung von Infektionen aus verschiedenen europĂ€ischen LĂ€ndern bĂŒndeln und die wichtigsten Ziele zur Erreichung eines hohen Standards von Hygienemaßnahmen in Europa definieren. Die Teilnehmer des Internationalen Symposions der Rudolf SchĂŒlke Foundation fordern, umgehend zu handeln und der Umsetzung des vorgeschlagenen 16-Punkte-Plans PrioritĂ€t einzurĂ€umen
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