Curtis Donskey and colleagues from the Cleveland Veterans Affairs Medical Center, Ohio, US, collected stool samples from inpatients and analysed these for S. aureus. The researchers also took samples from the patients’ nostrils, armpits and groins, as well as surrounding surfaces such as bed rails and bedside tables using a moist cotton swab. To determine whether these bacteria would be transferred to the researchers’ hands they bravely touched each of the skin and environmental sites with one hand previously disinfected with an alcohol hand rub. Handprints in agar jelly before and after testing were used to determine the presence of bacterial transfer.
The study’s most important finding was that patients harbouring S. aureus in both their intestines and noses were significantly more likely than those with this bacterium in their nostrils alone to have positive skin cultures. There was also a statistically non-significant trend toward contaminating surrounding surfaces and bacterial transfer to the investigator’s hands.
Cultures from environmental surfaces yielded an average of 12.7 colonies with a range of 1 to 80, while cultures from armpits and groins yielded colonies of bacteria “too numerous to count.” Hand cultures after contact with environmental and skin surfaces yielded an average of 15.3 colonies with a range of 1 to 80. Most of the patients colonized with S. aureus had the MRSA (Methicillin-resistant Staphylococcus aureus) strain, which is unaffected by treatment with certain antibiotics.
“Because staphylococci on skin may contaminate devices or wounds and be acquired on hands, our data provide support for the hypothesis that colonization of the intestinal tract may facilitate S. aureus infections and nosocomial transmission,” Donskey says.
New vaccine production could improve flu shot accuracy
25.07.2017 | Duke University
Chances to treat childhood dementia
24.07.2017 | Julius-Maximilians-Universität Würzburg
Strong light-matter coupling in these semiconducting tubes may hold the key to electrically pumped lasers
Light-matter quasi-particles can be generated electrically in semiconducting carbon nanotubes. Material scientists and physicists from Heidelberg University...
Fraunhofer IPA has developed a proximity sensor made from silicone and carbon nanotubes (CNT) which detects objects and determines their position. The materials and printing process used mean that the sensor is extremely flexible, economical and can be used for large surfaces. Industry and research partners can use and further develop this innovation straight away.
At first glance, the proximity sensor appears to be nothing special: a thin, elastic layer of silicone onto which black square surfaces are printed, but these...
3-D shape acquisition using water displacement as the shape sensor for the reconstruction of complex objects
A global team of computer scientists and engineers have developed an innovative technique that more completely reconstructs challenging 3D objects. An ancient...
Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.
For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...
What is the mass of a proton? Scientists from Germany and Japan successfully did an important step towards the most exact knowledge of this fundamental constant. By means of precision measurements on a single proton, they could improve the precision by a factor of three and also correct the existing value.
To determine the mass of a single proton still more accurate – a group of physicists led by Klaus Blaum and Sven Sturm of the Max Planck Institute for Nuclear...
21.07.2017 | Event News
19.07.2017 | Event News
12.07.2017 | Event News
25.07.2017 | Physics and Astronomy
25.07.2017 | Earth Sciences
25.07.2017 | Life Sciences