Full reference :Sun, C. et al. |Durable and Washable Antibacterial Copper Nanoparticles Bridged by Surface Grafting Polymer Brushes on Cotton and Polymeric Materials| Journal of Nanomaterials|
2018| DOI: 10.1155/2018/6546193
While the antibacterial properties of gold and silver are well known, and their effectiveness in reducing the growth of several microorganisms has been reported, the high cost of silver and gold has compelled material chemists to explore the possibility of using copper, as it has similar antimicrobial properties but is far less expensive.
Researchers from University of Manchester collaborated with Chinese scientists to create a ‘durable and washable, concrete like’ composite material made from antibacterial copper nanoparticles. Rather than using the traditional process of copper coating the polymer brush technique (polymer surface grafting) to create a strong chemcial bond developed by team proved far more effective. They tested these nanoparticles on cotton and polyester as each material was brushed with the nanoparticles. The cotton and polyester coated-copper fabrics showed excellent antibacterial resistance against Staphylococcus aureus (S. aureus) and E. coli, even after being washed 30 times.
To increase the durability of antibacterial coating on cotton and polymeric substrates, surface initiated grafting polymer brushes are introduced onto the substrates surface to bridge copper nanoparticles coatings and substrate. The morphologies of the composites consisting of the copper nanoparticles and polymer brushes were characterized with scanning electron microscopy (SEM).
It was found that copper nanoparticles were uniformly and firmly distributed on the surfaces of the substrates by the polymer brushes; meanwhile, the reinforced concrete-like structures were formed in the composite materials. The substrates coated by the copper nanoparticles showed the efficient antibacterial activity against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) even after washing by 30 cycles. The copper nanoparticles were tethered on the substrates by the strong chemical bonds, which led to the excellent washable fitness and durability. The change of the phase structure of the copper was analyzed to investigate the release mechanism of copper ions.
Full story at Science Daily
Related Infection Control Today Copper Coated Uniforms could Help Reduce Infection Transmission
Scientists from Rockefeller University, New York have discovered a class of distinctive anitiboitics in environmental samples. Tests show the compounds, called malacidins, annihilate several bacterial diseases that have become resistant to most existing antibiotics, including the superbug MRSA. As infectious diseases are the leading killer of humans worldwide, the team behind the discovery hope to be able to improve the drug’s effectiveness to exploit its full potential.
The researchers used a gene sequencing technique to analyse DNA extracted from more than 1,000 soil samples taken from across the US. This led to the discovery of the malacidins, a distinctive class of antibiotics that are commonly encoded in soil microbiomes but have never been reported in culture-based natural products (NP) discovery efforts.
The malacidins are active against multidrug-resistant pathogens, sterilize methicillinresistant Staphylococcus aureus skin infections in an animal wound model and did not select for resistance under laboratory conditions.
Full article at BBC News: New Antibiotic family discovered in dirt
The full text article can be downloaded from Nature Microbiology
Full reference: Hoover, B. M. | Culture- independent discovery of the malacidins as
calcium-dependent antibiotics with activity against multidrug-resistant Gram-positive pathogens | Nature Microbiology | 2018| Doi: https://doi.org/10.1038/s41564-018-0110-1
The third annual progress report on the UK 5 year antimicrobial resistance (AMR) strategy, including future plans | Department of Health
The third annual progress report describes the activities and achievements in the third year of implementation of the UK 5 year antimicrobial resistance (AMR) strategy 2013 to 2018, including significant international achievements.
The UK AMR strategy represents an ambitious programme to slow the development and spread of AMR, taking a ‘One Health’ approach spanning people, animals, agriculture and the wider environment.
The report sets out progress made in 2016, and notes that for the remaining 2 years of the strategy, the programme will focus on delivery of the government’s ambitions set out in response to the review on AMR led by Lord O’Neill. These include ambitions to halve certain types of infection and the inappropriate use of antibiotics.
Full report: UK 5 Year Antimicrobial Resistance (AMR) Strategy 2013-2018. Annual progress report, 2016
Public Health England have published a series of antibiotic awareness resources to support the Antibiotic Guardian campaign and local initiatives.
Antibiotic awareness: toolkit for healthcare professionals in England
Guidance to help the NHS, local authorities and others support European Antibiotic Awareness Day and the Antibiotic Guardian campaign, to encourage responsible use of antibiotics.
Antibiotic awareness: quizzes and crosswords
Quizzes and crosswords about antibiotic resistance for the public, healthcare prescribers and pharmacists.
Antibiotics: secondary care prescriber’s checklist
Prescribers in secondary healthcare can use this checklist to help make decisions about prescribing antibiotics.
Antibiotic awareness: posters and leaflets
Posters and leaflets (in 11 languages) for the public and healthcare professionals to support antibiotic awareness campaigns in the UK.
PHE have also produced a short video to help explain the issue of antibiotic resistance:
Antibiotic therapy (AT) is the cornerstone of the management of severe community-acquired pneumonia (CAP). However, the best treatment strategy is far from being established | Journal of Critical Care
- In SCAP patients, the use of combination of antibiotics that includes a macrolide is associated a better hospital and long term (6 months) survival.
- Courses of antibiotic therapy longer than 7 days are not associated with survival benefit but lead to longer ICU and hospital LOS.
- Serum lactate showed to be a good prognostic marker of hospital mortality in SCAP patients.
Full reference: Pereira, J.M. et al. (2017) Impact of antibiotic therapy in severe community-acquired pneumonia: Data from the Infauci study. Journal of Critical Care. Published online: 4 September 2017
Cancer researchers may have stumbled across a solution to reverse antibiotic drug resistance and stop infections like MRSA. | Via ScienceDaily
Experts warn we are decades behind in the race against superbugs having already exploited naturally occurring antibiotics, with the creation of new ones requiring time, money and ingenuity.
But a team of scientists at the University of Salford say they may have found a very simple way forward — even though they weren’t even looking for antibiotics.
And they have created and validated several new antibiotics already — many of which are as potent, or more so, than standard antibiotics, such as amoxicillin.
“A little like Alexander Fleming, we weren’t even looking for antibiotics rather researching into new compounds that might be effective against cancer stem cells,” explains Michael P. Lisanti, Chair of Translational Medicine at the University’s Biomedical Research Centre.
“I think we’ve accidentally invented a systemic way of creating new antibiotics which is simple, cheap and could be very significant in the fight against superbugs,” added Dr Federica Sotgia, a co-author on the study.
Full story at ScienceDaily
Full reference: Bela Ozsvari et al. Mitoriboscins: Mitochondrial-based therapeutics targeting cancer stem cells (CSCs), bacteria and pathogenic yeast | Oncotarget, Advance Publications | published online July 7th 2017