News tagged with bacteria
(Medical Xpress)—A research team, led by Jeremy Barr, a biology post-doctoral fellow, unveils a new immune system that protects humans and animals from infection.
Immunology May 20, 2013 | 4.8 / 5 (24) | 8 |
A compound abundant in red meat and added as a supplement to popular energy drinks has been found to promote atherosclerosis – or the hardening or clogging of the arteries – according to Cleveland Clinic ...
Cardiology Apr 07, 2013 | 4.8 / 5 (18) | 14 |
(HealthDay)—A new Swedish study suggests that parents who want to protect their infants from developing allergies should try a simple approach to introducing their children to the wide world of microbes: ...
Immunology May 06, 2013 | 4.7 / 5 (13) | 2 |
Studying gut bacteria can reveal a range of human illness. Now, new research shows that the composition of a person's intestinal bacteria could play an important role in the development of type 2 diabetes. These results, ...
Diabetes Sep 26, 2012 | 5 / 5 (10) | 6 |
Infection control experts at The Johns Hopkins Hospital have found that a combination of robot-like devices that disperse a bleaching agent into the air and then detoxify the disinfecting chemical are highly effective at ...
Diseases, Conditions, Syndromes Jan 01, 2013 | 5 / 5 (10) | 4 |
(Medical Xpress) -- Yale researcher Jose Cordova and Erich Astudillo from the University of Chile (and Founder of Top Tech Innovations SpA) have after working together, discovered a new molecule that kills the bacteria Streptococcus Mu ...
Dentistry Jul 10, 2012 | 4.5 / 5 (10) | 13 |
Chinese researchers have identified a bacteria which may cause obesity, according to a new paper suggesting diets that alter the presence of microbes in humans could combat the condition.
Overweight and Obesity Dec 19, 2012 | 5 / 5 (8) | 1
In a striking, unexpected discovery, researchers at Albert Einstein College of Medicine of Yeshiva University have determined that vitamin C kills drug-resistant tuberculosis (TB) bacteria in laboratory culture. The finding ...
Diseases, Conditions, Syndromes May 21, 2013 | 4.4 / 5 (7) | 0 |
(Medical Xpress)—Scientists at Karolinska Institutet in Sweden have presented a new principle for fighting bacterial infections, in other words, a new type of antibiotic, in the FASEB Journal. The new antibiotic mechan ...
Medical research Dec 18, 2012 | 5 / 5 (6) | 0 |
(Medical Xpress)—Scientists have long puzzled over why "bad" bacteria such as E. coli can thrive in the guts of those with inflammatory bowel disease (IBD), causing serious diarrhea. Now UC Davis resear ...
Inflammatory disorders Feb 07, 2013 | 5 / 5 (6) | 0 |
(Medical Xpress)—A new study in mice has shown that genetically engineered bacteria can protect against inflammatory bowel disease (IBD), which includes a host of conditions including ulcerative colitis and Crohn's disease.
Medical research Nov 02, 2012 | 5 / 5 (5) | 0 |
Researchers at The Johns Hopkins University and Yale University have discovered that a specialized receptor, normally found in the nose, is also in blood vessels throughout the body, sensing small molecules ...
Medical research Feb 26, 2013 | 5 / 5 (5) | 0 |
(Medical Xpress)—The inflammation of fat tissue is part of a spiraling series of events that leads to the development of type 2 diabetes in some obese people. But researchers have not understood what triggers ...
Medical research Mar 05, 2013 | 5 / 5 (5) | 0 |
A new study suggests that nicotinamide, more commonly known as vitamin B3, may be able to combat some of the antibiotic-resistance staph infections that are increasingly common around the world, have killed thousands and ...
Medical research Aug 27, 2012 | 4.8 / 5 (5) | 0 |
A first-ever vaccine created by University of Guelph researchers for gut bacteria common in autistic children may also help control some autism symptoms. The groundbreaking study by Brittany Pequegnat and Guelph chemistry ...
Autism spectrum disorders Apr 24, 2013 | 3.7 / 5 (6) | 1 |
Actinobacteria (high-G+C) Firmicutes (low-G+C) Tenericutes (no wall)
Aquificae Bacteroidetes/Chlorobi Chlamydiae/Verrucomicrobia Deinococcus-Thermus Fusobacteria Gemmatimonadetes Nitrospirae Proteobacteria Spirochaetes Synergistetes
Acidobacteria Chloroflexi Chrysiogenetes Cyanobacteria Deferribacteres Dictyoglomi Fibrobacteres Planctomycetes Thermodesulfobacteria Thermotogae
The bacteria [bækˈtɪərɪə] (help·info) (singular: bacterium)[α] are a large group of unicellular microorganisms. Typically a few micrometres in length, bacteria have a wide range of shapes, ranging from spheres to rods and spirals. Bacteria are ubiquitous in every habitat on Earth, growing in soil, acidic hot springs, radioactive waste, water, and deep in the Earth's crust, as well as in organic matter and the live bodies of plants and animals. There are typically 40 million bacterial cells in a gram of soil and a million bacterial cells in a millilitre of fresh water; in all, there are approximately five nonillion (5×1030) bacteria on Earth, forming much of the world's biomass. Bacteria are vital in recycling nutrients, with many steps in nutrient cycles depending on these organisms, such as the fixation of nitrogen from the atmosphere and putrefaction. However, most bacteria have not been characterized, and only about half of the phyla of bacteria have species that can be grown in the laboratory. The study of bacteria is known as bacteriology, a branch of microbiology.
There are approximately ten times as many bacterial cells in the human flora of bacteria as there are human cells in the body, with large numbers of bacteria on the skin and as gut flora. The vast majority of the bacteria in the body are rendered harmless by the protective effects of the immune system, and a few are beneficial. However, a few species of bacteria are pathogenic and cause infectious diseases, including cholera, syphilis, anthrax, leprosy and bubonic plague. The most common fatal bacterial diseases are respiratory infections, with tuberculosis alone killing about 2 million people a year, mostly in sub-Saharan Africa. In developed countries, antibiotics are used to treat bacterial infections and in agriculture, so antibiotic resistance is becoming common. In industry, bacteria are important in sewage treatment, the production of cheese and yoghurt through fermentation, as well as in biotechnology, and the manufacture of antibiotics and other chemicals.
Once regarded as plants constituting the class Schizomycetes, bacteria are now classified as prokaryotes. Unlike cells of animals and other eukaryotes, bacterial cells do not contain a nucleus and rarely harbour membrane-bound organelles. Although the term bacteria traditionally included all prokaryotes, the scientific classification changed after the discovery in the 1990s that prokaryotes consist of two very different groups of organisms that evolved independently from an ancient common ancestor. These evolutionary domains are called Bacteria and Archaea.
For more information about Bacteria, read the full article at
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