Through further modification of this testing method and trials carried out using a commercial, conventional process listed by the RKI at a laundry, the researchers at Hohenstein have successfully proven that viral bioindicators can be used to assess objectively the virucidal efficacy of disinfectant laundering processes not only in simulated laundering processes, but also under actual, field conditions.
Starting now, this new testing method allows the IHB at the Hohenstein Institute to offer an effective quality assurance tool for the detergent industry and laundering operations. Beyond that, in view of the increasing number of cases of viral illness, an important, additional tool has also been made available for preventive health care. The viral bioindicator is, therefore, a novelty in the area of applied hygiene.
Due to the lack of a suitable testing method, there have been until today no criteria for monitoring anti-viral (virucidal) efficacy of disinfectant laundering processes in the field. Using a method analogous to the standard techniques used by the German Association for Hygiene and Microbiology (Deutsche Gesellschaft für Hygiene und Mikrobiologie (DGHM)) to assess the bactericidal efficacy of chemical disinfectant processes, the IHB in May carried out laundering trials with test textile swatches contaminated with the bacteriophage MS2 (a pathogen similar to Norovirus). In laboratory conditions similar to those in the field, it was demonstrated that the bioindicators containing bacteriophages such as MS2 are suitable for testing and proving the virucidal efficacy of disinfectant laundering.
The Hohenstein Institute's newly developed method is even appropriate for suitability testing of disinfectant laundering processes in field conditions in accordance with the Sections 4.4.3 and 6.4 of the guidelines of the Commission for Hospital Hygiene and Applied Infection Control of the Robert Koch Institute. Upon successful completion of this special suitability test, it is incumbent upon the consultant in charge of hygiene at the IHB to recognise the disinfectant efficacy of the laundering process.
This means that in future it will be possible to use a viral bioindicator to test reprocessing of Sector B (effective against viruses) laundry in the field in a way comparable to the procedure for quality assurance currently used for bactericidal laundry (Sector A). Laundry detergent manufacturer CHT R. Beitlich GmbH agreed to become a pilot customer and became the first to use viral bioindicators in practice. Laundering tests were carried out at the facility of Busch Textilservice GmbH & Co. KG in Bärenbach. In this field trial, bioindicators were applied in three independent, tunnel washer laundering cycles. At the same time, all process parameters were monitored, as well as sampling washwater for presence of the test virus. In experiments carried out under field conditions, CHT R. Beitlich GmbH's BEICLEAN HWA/BEIBLEACH WP35 process listed by the RKI achieved perfect results. As a result, the virucidal efficacy of the listed process could be confirmed in testing under actual field conditions.
Rose-Marie Riedl | idw
How the insulin receptor works
19.02.2018 | Helmholtz Zentrum München - Deutsches Forschungszentrum für Gesundheit und Umwelt
At last, butterflies get a bigger, better evolutionary tree
16.02.2018 | Florida Museum of Natural History
Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale
Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...
For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.
But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...
Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.
The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...
Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters
Quantum computer parts are sensitive and need to be cooled to very low temperatures. Their tiny size makes them particularly susceptible to a temperature...
Let’s say the armrest is broken in your vintage car. As things stand, you would need a lot of luck and persistence to find the right spare part. But in the world of Industrie 4.0 and production with batch sizes of one, you can simply scan the armrest and print it out. This is made possible by the first ever 3D scanner capable of working autonomously and in real time. The autonomous scanning system will be on display at the Hannover Messe Preview on February 6 and at the Hannover Messe proper from April 23 to 27, 2018 (Hall 6, Booth A30).
Part of the charm of vintage cars is that they stopped making them long ago, so it is special when you do see one out on the roads. If something breaks or...
15.02.2018 | Event News
13.02.2018 | Event News
12.02.2018 | Event News
16.02.2018 | Information Technology
16.02.2018 | Health and Medicine
16.02.2018 | Physics and Astronomy