Bacteria responsible for a lethal form of food poisoning may escape the immune system by hiding out in the gall bladder of seemingly healthy people. The finding by researchers at Stanford University School of Medicine suggests that an unwitting food worker could transmit the bacteria to others by contaminating food products.
The bacteria, Listeria monocytogenes, can cause severe illness or death in people with weakened immune systems and may cause miscarriage in pregnant women. "Twenty to 40 percent of people with listeriosis" - the disease caused by Listeria infection - "die even after antibiotic treatment," said Jonathan Hardy, PhD, the studys first author and a research associate in the Department of Pediatrics. The research is published in the Feb. 6 issue of Science.
Listeriosis causes about 500 U.S. deaths annually; pregnant women are about 20 times more likely than other healthy adults to become infected. Unlike many bacteria, Listeria is perfectly happy growing at refrigerator-like temperatures and can survive for long periods outside of its many animal hosts. It is most commonly found in foods such as soft cheeses and deli meats - products pregnant women are often told to avoid.
Krista Conger | EurekAlert!
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The well-known representation of chemical elements is just one example of how objects can be arranged and classified
The periodic table of elements that most chemistry books depict is only one special case. This tabular overview of the chemical elements, which goes back to...
Light can be used not only to measure materials’ properties, but also to change them. Especially interesting are those cases in which the function of a material can be modified, such as its ability to conduct electricity or to store information in its magnetic state. A team led by Andrea Cavalleri from the Max Planck Institute for the Structure and Dynamics of Matter in Hamburg used terahertz frequency light pulses to transform a non-ferroelectric material into a ferroelectric one.
Ferroelectricity is a state in which the constituent lattice “looks” in one specific direction, forming a macroscopic electrical polarisation. The ability to...
Researchers at TU Graz calculate the most accurate gravity field determination of the Earth using 1.16 billion satellite measurements. This yields valuable knowledge for climate research.
The Earth’s gravity fluctuates from place to place. Geodesists use this phenomenon to observe geodynamic and climatological processes. Using...
Discovery by Brazilian and US researchers could change the classification of two species, which appear more akin to jellyfish than was thought.
The tube anemone Isarachnanthus nocturnus is only 15 cm long but has the largest mitochondrial genome of any animal sequenced to date, with 80,923 base pairs....
Researchers at Chalmers University of Technology, Sweden, have discovered a completely new way of capturing, amplifying and linking light to matter at the nanolevel. Using a tiny box, built from stacked atomically thin material, they have succeeded in creating a type of feedback loop in which light and matter become one. The discovery, which was recently published in Nature Nanotechnology, opens up new possibilities in the world of nanophotonics.
Photonics is concerned with various means of using light. Fibre-optic communication is an example of photonics, as is the technology behind photodetectors and...
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