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Shigella


Shigella boydii
Shigella dysenteriae
Shigella flexneri
Shigella sonnei Shigella are Gram-negative, nonmotile, nonsporeforming rod-shaped bacteria. They are pathogens of humans and other primates, causing shigellosis. Depending on age and condition of the host, as few as 10 cells can be enough to cause an infection. The disease is caused when virulent Shigella organisms attach to, and penetrate, epithelial cells of the intestinal mucosa. After invasion, they multiply intracellularly, and spread to contiguous epitheleal cells resulting in tissue destruction. Some strains produce enterotoxin and Shiga toxin (very much like the verotoxin of E. coli O157:H7).


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(Date:11/25/2009)...elin, a hormone produced in the stomach, may be us...t of Parkinson,s disease, Yale School of Medicine ...t issue of the Journal of Neuroscience . , Park...amine neurons in an area of the midbrain known as ...amine production. Reduced production of dopamine ...
(Date:11/25/2009)...ISON, WI, NOVEMBER 25, 2009 Soil is the linchpin ...nd hydrosphere meet. Despite that, many students s...t nothing more. Soil science educators are challen...ic recognize the critical importance of soil in th...l science and earth science teachers at University...
(Date:11/24/2009)... thousands of years it has been prescribed by trad...ents from headaches and stomach pain to fever and ...castle University have been able to scientifically...enata otherwise known as Brazilian mint. , Test...team led by researcher Graciela Rocha was able to ...
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