Researchers find the immune system's unknown messenger

Researchers can now explain how a cell that is being attacked by bacteria or viruses specifically manages to 'sound the alarm' among its neighbouring cells so they can react with a quick response.

Researchers uncover hypervirulent listeria clonal groups

(Phys.org)—A large team of researchers affiliated with several institutions in France has conducted a two-pronged study of the bacteria that causes listeriosis and in so doing has identified strains that are more virulent ...

Five new Listeria species found; may improve tests

(Phys.org) —Cornell researchers have discovered five new species of a group of bacteria called Listeria – including one named for Cornell – that provide new insights that could lead to better ways to detect soil bacteria ...

New antibiotic could make food safer and cows healthier

Food-borne diseases might soon have another warrior to contend with, thanks to a new molecule discovered by chemists at the University of Illinois. The new antibiotic, an analog of the widely used food preservative nisin, ...

Researchers discover a compound that controls Listeria

In a year when cantaloupe tainted with the bacterium Listeria monocytogenes killed 30 people, the discovery of a compound that controls this deadly bacteria -- and possibly others -- is great news.

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Listeria

Listeria is a bacterial genus that contains seven species. Named after the English pioneer of sterile surgery Joseph Lister, the genus received its current name in 1940. Listeria species are gram-positive bacilli. The major human pathogen in the Listeria genus is L. monocytogenes. It is usually the causative agent of the relatively rare bacterial disease, listeriosis, a serious infection caused by eating food contaminated with the bacteria. The disease affects primarily pregnant women, newborns, adults with weakened immune systems, and the elderly.

Listeriosis is a serious disease for humans; the overt form of the disease has a mortality rate of about 20 percent. The two main clinical manifestations are sepsis and meningitis. Meningitis is often complicated by encephalitis, a pathology that is unusual for bacterial infections. Listeria ivanovii is a pathogen of mammals, specifically ruminants, and has rarely caused listeriosis in humans.

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