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Latest Proteobacteria Stories

2009-01-27 13:31:37

Helicobacter pylori, a Gram-negative, flagellated, microaerophilic bacterium, can selectively colonize in the human stomach. Its infection is widespread throughout the world, and is present in about 50% of the global human population with 80% in developing countries and 20-50% in industrialized countries. Infection of the stomach with H. pylori induces a local immune response with infiltration of the mucosa by macrophages, neutrophils and lymphocytes. Although the innate and adaptive immune...

2009-01-24 14:18:50

Health officials in Minnesota say they're checking to see if deadly Hib infections have been reported in children in other states. Minnesota last year recorded five cases of infection from Haemophilus influenzae Type B, including the death of a 7-month-old -- the first child Hib fatality in the state since 1991, The Washington Post reported Saturday. The dangerous bacterium's return may be a consequence of a temporary vaccine shortage and a resistance by some parents to immunize their...

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2009-01-23 08:20:00

If you want to know how prehistoric people migrated, follow the "bugs" they carried with them. A consortium of scientists that included two from Baylor College of Medicine and the Michael E. DeBakey Veterans Affairs Medical Center in Houston did just that and in a report in the current issue of the journal Science, they described the two prehistoric migrations that populated the nations of the Pacific Ocean by looking at the travels of two different strains of a particularly nasty bacteria...

2009-01-01 08:48:00

Bismuth compounds have been used for centuries in medicine. The discovery of H. pylori in 1983 led to renewed interest in bismuth compounds, because these were found to successfully treat the infection in combination with antibiotics. However, in the 1970s bismuth salts, used at high doses for prolonged periods, were found to lead to neurotoxicity. There has been no summary of evidence for the toxicity of bismuth when used for short periods as part of H. pylori eradication therapy. A research...

2009-01-01 08:45:44

Campylobacters are small Gram-negative spiral rods. Campylobacter jejuni (C. jejuni), a foodborne organism contracted from untreated water, milk and meat, especially chicken, is one of the most important causes of bacterial diarrhea worldwide. However, its mode of pathogenesis is not clear. A research article to be published on December 28, 2008 in the World Journal of Gastroenterology addresses this question. The research team led by Christopher J Hawkey from Nottingham University Hospital...

2008-11-24 17:20:00

Bacteria that cause stomach ulcers and cancer could also be giving us bad breath, according to research published in the December issue of the Journal of Medical Microbiology. For the first time, scientists have found Helicobacter pylori living in the mouths of people who are not showing signs of stomach disease.The mouth is home to over 600 different species of bacteria, some of which can cause disease. Helicobacter pylori has recently been shown to cause stomach ulcers and is also...

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2008-11-20 11:07:15

Brown University physicists have completed the most detailed study of the swimming patterns of a microbe, showing for the first time how its movement is affected by drag and a phenomenon called Brownian motion. The findings appear online this week in the Proceedings of the National Academy of Sciences. Imagine yourself swimming in a pool: It's the movement of your arms and legs, not the viscosity of the water, that mostly dictates the speed and direction that you swim. For tiny organisms, the...

2008-11-06 15:00:29

U.S. medical scientists say they've determined chronic inflammation can cause stomach cancer -- the second leading cause of cancer deaths in the world. The multi-center research team led by Columbia University Medical Center said it discovered, for the first time, that elevated levels of a single pro-inflammatory cytokine, an immune system protein called IL-1 Beta, can start the progression towards stomach cancer. The scientists said they hope their finding will lead to development of ways...

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2008-10-29 11:38:21

Like something from a horror movie, the swarm of bacteria ripples purposefully toward their prey, devours it and moves on. Researchers at the University of Iowa are studying this behavior in Myxococcus xanthus (M. xanthus), a bacterium commonly found in soil, which preys on other bacteria. Despite its deadly role in the bacterial world, M. xanthus is harmless to humans and might one day be used beneficially to destroy harmful bacteria on surfaces or in human infections, said John Kirby,...

2008-10-22 09:00:42

Trius Therapeutics, a developer of antibacterial drugs, has received a $28 million contract from the National Institute of Allergy and Infectious Diseases, a component of the National Institutes of Health, for the development of novel antibiotics directed against multiple Gram-negative bacterial pathogens. Under the five-year contract, Trius will develop novel drugs targeting bacterial DNA gyrase and topoisomerase IV, with the aim of optimizing these drugs for activity against relevant...


Latest Proteobacteria Reference Libraries

0_0d5d532211b8a47882b168c09689c84f
2011-04-25 21:28:48

Salmonella enterica is a subspecies of Salmonella enterica, the rod shaped, flagellated, aerobic, Gram-negative bacterium. It is a member of the genus Salmonella and many of the pathogenic serovars of the S. enterica species are in this subspecies. Serovars can be designated fully or in a shortened form. The genus, Salmonella, is on the short form lists which are followed by the capitalized and non-italicized serovar. Each serovar can have many strains as well, which allows for a rapid...

72_d0e074525de5bb741daf382f8d62213f
2011-04-25 16:38:12

Neisseria meningitidis is a heterotrophic gram-negative diplococcal bacterium best known for its role in meningitis and other forms of meningococcal disease such as meningococcemia. It is a major cause of morbidity and mortality during childhood in industrialized countries and is responsible for epidemics in Africa and in Asia. In the US there are approximately 2500 to 3500 cases of N. meningitides infections. Children under 5 are at a higher risk as well as people in the sub-Saharan...

45_d6be6f801c571ef90f6e4b56412c5274
2011-04-15 15:38:47

Helicobacter pylori is a Gram-negative, microaerophilic bacterium that can inhabit various areas of the stomach, particularly the antrum. It causes low-level inflammation of the stomach lining and is linked to gastric ulcers and stomach cancer. Out of those infected, 80%, are asymptomatic. It was initially named Campyloacter pyloridis and then renamed C. pylori to correct the Latin grammar error. It was later placed in the genus, Helicobacter. Over 50% of the population has H. pylori in...

72_63ad42c17b548b76aff6af345a402a04
2011-04-15 15:26:30

Haemophilus influenzae is a Gram-negative, rod-shaped bacterium first described in 1892 by Richard Pfeiffer during an influenza pandemic. It is generally aerobic but can grow as a facultative anaerobe. H. influenzae was mistakenly considered to be the cause of influenza until 1933 when the flu virology became apparent. It was the first free-living organism to have its entire genome sequenced. The project was completed and published in 1995. Two major categories were defined: the...

72_d98ab0249709d892687c999e0e599da3
2011-04-15 15:19:01

Haemophilus ducreyi is a fastidious gram-negative coccobacillus causing the sexually transmitted disease chancroid, a major cause of genital ulceration in developing countries characterized by painful sores on the genitalia. Early symptoms are dark and light green shears in excrement. Chancroid starts as an erythematous popular lesion that breaks down into a painful bleeding ulcer. It can be cultured on chocolate agar. It is an opportunistic microorganism that infects through the...

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Word of the Day
penuche
  • A fudgelike confection of brown sugar, cream or milk, and chopped nuts.
'Penuche' is a variant of 'panocha,' a coarse grade of sugar made in Mexico. 'Panocha' probably comes from the Spanish 'panoja, panocha,' ear of grain.
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