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Blood in stool looks different depending on how early it enters the digestive tract—and thus how much digestive action it has been exposed to—and how much there is. The term can refer either to melena, with a black appearance, typically originating from upper gastrointestinal bleeding; or to hematochezia, with a red color, typically originating from lower gastrointestinal bleeding. [6]
Symptoms include diarrhea, abdominal pain, gas, bloating, and mucous or blood in stool. It’s often diagnosed via a colonoscopy or other test, and treatments include anti-inflammatory or steroid ...
A complete blood count as well as an hemoglobin test should be performed when a patient presents symptoms of hematochezia. A colonoscopy may be necessary if there is suspicion of bleed from colon particularly in the elderly to look for the site and many causes of bleed like carcinoma, ulcerative colitis, rectal varices or other lesions and in certain instances upper gastrointestinal endoscopy ...
Diarrhea is defined by the World Health Organization as having three or more loose or liquid stools per day, or as having more stools than is normal for that person. [2] Acute diarrhea is defined as an abnormally frequent discharge of semisolid or fluid fecal matter from the bowel, lasting less than 14 days, by World Gastroenterology ...
Melena is a form of blood in stool which refers to the dark black, tarry feces that are commonly associated with upper gastrointestinal bleeding. [1] The black color and characteristic strong odor are caused by hemoglobin in the blood being altered by digestive enzymes and intestinal bacteria.
Shigella results in about 165 million cases of diarrhea and 1.1 million deaths a year with nearly all cases in the developing world. [5] In areas with poor sanitation nearly half of cases of diarrhea are due to Entamoeba histolytica. [6] Entamoeba histolytica affects millions of people and results in more than 55,000 deaths a year. [12]
As in the related condition TTP, reduced blood flow through the narrowed blood vessels of the microvasculature leads to reduced blood flow to vital organs, and ischemia may develop. [11] The kidneys and the central nervous system (brain and spinal cord) are the parts of the body most critically dependent on high blood flow, and are thus the ...
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