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Gas gangreneX (also known as clostridial myonecrosis [1]) is a bacterial infection that produces tissue gas in gangrene. This deadly form of gangrene usually is caused by Clostridium perfringens bacteria. About 1,000 cases of gas gangrene are reported yearly in the United States. [2] Myonecrosis is a condition of necrotic damage, specific to ...
Gangrene itself happens when the tissue loses blood flow and becomes deprived of oxygen and nutrients. Without proper blood supply, cells in the affected area start dying, leading to decay. There are different types of gangrene, including dry, wet, and gas gangrene, depending on the underlying cause and the conditions of the tissue.
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Air can be trapped under the skin in necrotizing infections such as gangrene, occurring as a late sign in gas gangrene, [2] of which it is the hallmark sign. Subcutaneous emphysema is also considered a hallmark of Fournier gangrene. [26] Symptoms of subcutaneous emphysema can result when infectious organisms produce gas by fermentation. When ...
Barotrauma is physical damage to body tissues caused by a difference in pressure between a gas space inside, or in contact with, the body and the surrounding gas or liquid. [1] [2] The initial damage is usually due to over-stretching the tissues in tension or shear, either directly by an expansion of the gas in the closed space or by pressure difference hydrostatically transmitted through the ...
This toxin has been shown to be the key virulence factor in infection with C. perfringens; the bacterium is unable to cause disease without this toxin. [1] Further, vaccination against the alpha toxin toxoid protects mice against C. perfringens gas gangrene. [2]
He worked on the tubercle bacillus and identified the bacillus responsible for gas gangrene, now known as Clostridium perfringens. [1] [7] Nuttall's Microscopic Thermostat [8] From 1892 to 1899 Nuttall was in Germany once more, first in Göttingen, then in Berlin, where he worked at the Hygienic Institute (hygienischen Institut).
This group of metallopeptidases constitutes the MEROPS peptidase family M9, subfamilies M9A and M9B (microbial collagenase, clan MA(E)). The protein fold of the peptidase domain for members of this family resembles that of thermolysin, the type example for clan MA and the predicted active site residues for members of this family and thermolysin occur in the motif HEXXH.