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Fetal blood contains fetal hemoglobin composed of two alpha and two gamma subunits (aka hemoglobin F or HbF; i.e., normal fetal hemoglobin). This difference in composition gives the different types of hemoglobin different chemical properties (in addition to the higher affinity HbF has for dissolved blood oxygen over HbA, allowing baby to ...
The primary transmission route is the litter box that is shared by both infected and uninfected cats, where a well-timed use by two cats can transfer the parasite from the feces of one cat to the paws of another where they later become ingested during the act of grooming. In cats, Tritrichomonas foetus is able to live several days in wet stool ...
Steatorrhea (or steatorrhoea) is the presence of excess fat in feces.Stools may be bulky and difficult to flush, have a pale and oily appearance, and can be especially foul-smelling. [1]
When someone sees blood in their stool, their mind often jumps to colon cancer, but the first sign of colon cancer is usually anemia, Dr. Swaminath says. Colon cancers can cause bleeding and a ...
The presence of bright red blood in stool, known as hematochezia, typically indicates lower gastrointestinal bleeding. Digested blood from the upper gastrointestinal tract may appear black rather than red, resulting in "coffee ground" vomit or melena. [2] Other signs and symptoms include feeling tired, dizziness, and pale skin color. [18]
Fecal occult blood testing (FOBT), as its name implies, aims to detect subtle blood loss in the gastrointestinal tract, anywhere from the mouth to the colon.Positive tests ("positive stool") may result from either upper gastrointestinal bleeding or lower gastrointestinal bleeding and warrant further investigation for peptic ulcers or a malignancy (such as colorectal cancer or gastric cancer).
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]
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