The central dogma of molecular biology postulates that the information packets encoded within the molecules of deoxyribonucleic acid (DNA) are first transcribed into molecules of messenger ribonucleic acids (mRNAs), and then ...
Infectious diseases currently cause about one-third of all human deaths worldwide, more than all forms of cancer combined. Advances in cell biology and microbial genetics have greatly enhanced understanding of the cause and ...
Cell & Microbiology
Oct 10, 2009
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(PhysOrg.com) -- Relatively harmless microbes which pass through water treatment systems could be allowing dangerous bacteria, such as Legionella, to reproduce in drinking water supplies, researchers have warned following ...
Environment
Feb 22, 2011
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Declining atmospheric sulfur dioxide levels might be related to the global rise in Legionnaires' disease—a severe form of pneumonia caused by inhaling the pathogenic bacteria Legionella. So reports a new University at Albany ...
Environment
Mar 12, 2024
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Contrary to some scientific beliefs, Flinders University PhD candidate Michael Taylor has literally grown his own evidence to suggest the bacterium which causes the potentially-fatal Legionnaires’ disease is more than ...
Cell & Microbiology
Sep 19, 2011
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Research at the University of Sheffield, published in the latest issue of Water Science and Technology: Water Supply, points the way to more sophisticated and targeted methods of ensuring our drinking water remains safe to ...
Cell & Microbiology
Aug 14, 2013
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Researchers at Uppsala University have discovered that the ancestors of legionella bacteria infected eukaryotic cells as early as two billion years ago. It happened soon after eukaryotes began to feed on bacteria. These results, ...
Evolution
Feb 15, 2022
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250
They call it Legionella bononiensis: it is the 64th species of Legionella identified worldwide, the second to be isolated in Italy since the discovery of the pathogen. It was discovered in 2019 in a hotel facility by researchers ...
Evolution
Jan 10, 2023
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A fully automated testing device can now be deployed at water sites suspected of contamination by Legionella bacteria. The device promises more reliable results in less than two hours, with no human intervention.
Analytical Chemistry
Oct 24, 2018
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4
New research from Oregon Health & Science University could one day lead to therapies that prevent or treat diseases and infections tied to a protein that's found in all human cells.
Cell & Microbiology
Dec 12, 2023
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Legionella is a pathogenic Gram negative bacterium, including species that cause legionellosis or Legionnaires' disease, most notably L. pneumophila. It may be readily visualized with a silver stain.
Legionella is common in many environments, with at least 50 species and 70 serogroups identified. The side-chains of the cell wall carry the bases responsible for the somatic antigen specificity of these organisms. The chemical composition of these side chains both with respect to components as well as arrangement of the different sugars determines the nature of the somatic or O antigen determinants, which are essential means of serologically classifying many Gram-negative bacteria.
Legionella acquired its name after a July, 1976 outbreak of a then-unknown "mystery disease" sickened 221 persons, causing 34 deaths. The outbreak was first noticed among people attending a convention of the American Legion - an association of U.S. military veterans. The convention in question occurred in Philadelphia during the U.S. Bicentennial year. This epidemic among U.S. war veterans, occurring in the same city as – and within days of the 200th anniversary of – the signing of the Declaration of Independence, was widely publicized and caused great concern in the United States. On January 18, 1977 the causative agent was identified as a previously unknown bacterium, subsequently named Legionella. See Legionnaires' Disease for full details.
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