Scientists have analyzed the complete genome sequence of an emerging human pathogen, Streptococcus agalactiae (also known as group B streptococcus or "strep B"), which is a leading cause of pneumonia and meningitis in newborns and the source of life-threatening illnesses in a growing number of adults with deficient immune systems.
The study, published this week in the on-line version of the Proceedings of the National Academy of Sciences (PNAS), not only determined the pathogens genetic makeup but also compared it to other isolates of the same microbe. That analysis shed light onto why S. agalactiae -- which is found in the digestive or genital tracts of many healthy people – has emerged in recent years as a more widespread and virulent cause of illness in certain adults.
"We were surprised to find so many differences among the isolates of this important pathogen," said Hervé Tettelin, an associate investigator at The Institute for Genomic Research (TIGR) who led the sequencing project. "Those differences could help explain why some strains of S. agalactiae are much more virulent than others."
Debbie Lebkicher | EurekAlert!
Flow of cerebrospinal fluid regulates neural stem cell division
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So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
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The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...
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Cardiovascular tissue engineering aims to treat heart disease with prostheses that grow and regenerate. Now, researchers from the University of Zurich, the Technical University Eindhoven and the Charité Berlin have successfully implanted regenerative heart valves, designed with the aid of computer simulations, into sheep for the first time.
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A team of scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg investigated optically-induced superconductivity in the alkali-doped fulleride K3C60under high external pressures. This study allowed, on one hand, to uniquely assess the nature of the transient state as a superconducting phase. In addition, it unveiled the possibility to induce superconductivity in K3C60 at temperatures far above the -170 degrees Celsius hypothesized previously, and rather all the way to room temperature. The paper by Cantaluppi et al has been published in Nature Physics.
Unlike ordinary metals, superconductors have the unique capability of transporting electrical currents without any loss. Nowadays, their technological...
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