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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:8/22/2014)... heard of the birds and the bees. But ... are being fertilized. The fertilization process for flowering ... between the male and female reproductive cells. New ... Heidelberg, and Munich, and including Carnegie,s Wolf Frommer, ... the chemical signaling process that guides flowering plant ...
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... Katholieke Universiteit Leuven have discovered an important new mechanism with ... way − and with the same effects as when ... teach us more about how food affects our body; and, ... for medicines. Receptors , Every living ...
... associated with nine metabolic traits and is the first ... for current disease. The traits are indicators for common ... pressure, inflammation and lipid levels. Cohorts are followed ... these data will help researchers to dissect the complex ...
... Quantum dots, tiny luminescent particles made of semiconductors, ... However, if doctors were to use them in ... their size and possible toxicity. Scientists at ... have found a way around those limitations by ...
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