This tree is constructed from an analysis of small subunit rRNA sequences sampled from approximately 3,000 species from throughout the Tree of Life. The species were chosen based on their availability, but most of the major taxonomic groups were included,
This program takes as input a protein sequence and a multiple alignment of a protein family and computes a jumping alignment of the sequence and the alignment.
La definición de persona no es un problema científico. Puede dilucidarse científicamente cuándo el embrión se implanta, cuántas células tiene aproximadamente en ese momento, cuándo el feto desarrolla un cerebro que puede experimentar dolor (puede leer más sobre eso aquí), cuándo hay pérdida total e irreversible de la actividad cerebral, etcétera.
Researchers have have discovered a distinctive chemical signature for placental and cerebral malaria which kill hundreds of thousands of young children a year, giving the option of earlier,or more intense treatment in those who need it.
A compilation of important epidemiologic concepts and common biostatistical terms used in medical research. For more detailed information on these topics, use the reference list at the end of the document.
In light of increased media and public interest in ESBL-producing E. coli, the HPA provides some background about these infections and the work that is being carried out in this area.
The Government chief vet has ruled out vaccination against foot and mouth despite confirmation the virus had been found on another farm in Surrey, the third this month.
Dengue fever is reaching epidemic levels in the Caribbean and Latin America. Changing weather patterns and increased tourism and migration have raised the prevalence of the disease.
A vaccine against Epstein Barr virus (EBV) is being used to stimulate the body's immune system to attack cancer cells. Initial tests show the vaccine has produced promising results.
A cheetah at a zoo in Nuremberg has died after contracting an illness similar to mad cow disease, becoming the 1st confirmed case in Germany of so called feline spongiform encephalopathy (FSE).
The government has set up a 10km (6.2 mile) control zone centred on the affected site near Egham, Surrey, and a pre-emptive slaughter has been ordered.
Scientists knew that frogs don't produce the toxic compounds themselves, but rather acquire them from their diet. For instance, poison frogs raised on a diet of fruit flies—which contain no alkaloids—quickly lose their dangerous slime.
Parents are being urged to protect their children against measles by getting them immunised with two doses of MMR before they return to school this September, following an increase in cases of measles over recent weeks.
The latest UK MRSA blood poisoning figures show a 10% decrease in the last complete year, with 6,381 cases of MRSA reported in England between April 2006 and March 2007, compared to 7096 between April 2005 and March 2006. Latest annual cases of C. diffici
Pseudomonas bacteria which are normally found in soil and ground water and rarely affect healthy people, but are most likely to affect those who are already very sick.
For the average person, popping vitamin C pills is unlikely to ward off the common cold or shorten its length or severity. However, for people exposed to short bouts of extreme physical exercise or cold temperatures, vitamin C may markedly reduce their ri
Britons travelling abroad to exotic destinations are now able to receive immediate and free travel health information regarding malaria thanks to a new text messaging service funded by GlaxoSmithKline Travel Health as part of the Malaria Awareness Campaig
Yoghurt health drinks are at the centre of safety fears after 24 patients died during clinical trials of probiotics, the dietary supplements containing potentially beneficial bacteria.
This study shows that Campylobacter bacteriophage can easily be isolated from free-range chickens and form part of the normal microbiological biota of environmentally exposed birds.
Researchers have measured concentrations of bacteria in the cabin air of 12 commercial passenger aircraft and found that flying may be safer than we think.
Mycobacterium paratuberculosis releases a molecule that prevents a type of white blood cell from killing E. coli, which is known to be present within Crohn's disease tissue in increased numbers.
The US National Institute of Health has become the first major US agency to require those who receive public money to make their results available to the public.
The highly contagious Norovirus can be passed from one person to another through contact with commonly shared items such as computer keyboards and computer mice, U.S. health officials report.