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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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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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 ...
Routine sampling of water supplies and genomic sequencing to determine the entire genetic makeup of Legionella bacteria could play a key role in identifying the source of Legionnaires' disease outbreaks, research suggests.
Cell & Microbiology
Oct 12, 2022
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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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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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(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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(PhysOrg.com) -- Scientists have worked out how to control a protective mechanism found in many bacteria that helps them grow and stay alive.
Cell & Microbiology
Dec 3, 2010
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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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Like false-negative results for virus testing, Flinders University experts have found that standard testing for Legionnaires' disease is not always failsafe.
Cell & Microbiology
Feb 21, 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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