Patients given transfusions of blood stored for 29 days or more (still good in U.S. standards), are two times more likely to have a contagious infection in the hospital than those who get newer blood, researchers said. Regulation of U.S. Food and Drug Agency to allow the blood is stored until 42 days before having to be discarded. But researchers at Cooper University Hospital in Camden, New Jersey, found that blood stored nearly two weeks of the deadline it still may be problematic.

The researchers are tracking 422 patients hospitalized in an intensive care and given blood transfusions from July 2003 until September 2006. If they received blood stored 29 days or more, their blood stream infections, pneumonia, urinary tract infections, heart valve infections, sepsis (a serious medical condition in which inflammation occurs throughout the body caused by infection) and other infections with a possible two-fold compared with patients who received blood stored 28 days at the latest. These infections were not caused by contaminated blood donated at the time, but due to deterioration over time, the researchers said.
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Reactions that occurred in urticaria are hypersensitivity reactions, or overreaction to substances that are actually very common. Now, on cholinergic urticaria, this occurs due to stimulation of the autonomic nervous system in the crust. The typical symptoms can be in a form of patches of redness to bump in small pieces that follow the size of skin pores. The cause of the small bump is the change in the ability of blood vessels to hold the liquid inside (permeability) so that the fluid is out and appear as a small bump on the skin. Meanwhile, itching, caused by stimulation of certain body cells in the skin area, such as mast cells, which then rupture and release materials mediators, e.g. histamine, which causes itch.

Principally, cholinergic urticaria occurs when someone is starting to sweat. For example is when he does a lot of activity or other things that trigger sweating, such as emotional factors, stress, certain foods, or hot weather. The abnormalities starting from red spots up to little bumps will subside after the sweat disappears.

Although the process is unclear, urticaria sometimes can be reduced accordingly. It seems like there is a process of adaptation until finally the symptoms do not appear again. The process of adaptation is used as the basis for the implementation of desensitization therapy, i.e. therapy to make someone no longer sensitive to certain ingredients. However, until now the results are still not yet predicted with certainty.
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