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
Ion treatments for cardiac arrhythmia — Non-invasive alternative to catheter-based surgery
20.01.2017 | GSI Helmholtzzentrum für Schwerionenforschung GmbH
Seeking structure with metagenome sequences
20.01.2017 | DOE/Joint Genome Institute
An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...
Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...
Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...
Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales
Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...
Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.
As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...
19.01.2017 | Event News
10.01.2017 | Event News
09.01.2017 | Event News
20.01.2017 | Awards Funding
20.01.2017 | Materials Sciences
20.01.2017 | Life Sciences