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Major groups of parasites include protozoans (organisms having only one cell) and parasitic worms (helminths). Of these, protozoans, including cryptosporidium, microsporidia, and isospora, are most common in HIV-infected persons. Each of these parasites can infect the digestive tract, and sometimes two or more can cause infection at the same time.
The cause of a pinworm infection is the worm Enterobius vermicularis. The entire lifecycle – from egg to adult – takes place in the human gastrointestinal tract of a single human host. [ 12 ] [ 17 ] This process is two to eight weeks.
This malabsorption causes fatty stools, substantial weight loss, and fatigue. [10] Additionally, those with giardiasis often have difficulty absorbing lactose, vitamin A, folate, and vitamin B 12. [11] [4] In children, prolonged giardiasis can cause failure to thrive and may impair mental development.
Rectal tenesmus is a feeling of incomplete defecation. [1] It is the sensation of inability or difficulty to empty the bowel at defecation, even if the bowel contents have already been evacuated.
The parasite cryptosporidium, known as crypto, was the most common cause of waterborne disease outbreaks associated with these recreational spaces, with 91% of cases. It can be transmitted by ...
If a specific cause is not found it is classified as "idiopathic pruritus ani". [3] The irritation can be caused by intestinal parasites, anal perspiration, frequent liquid stools, diarrhea, residual stool deposits, or the escape of small amounts of stool as a result of incontinence or flatulence. Another cause is yeast infection or candidiasis.
Human parasites are divided into endoparasites, which cause infection inside the body, and ectoparasites, which cause infection superficially within the skin. The cysts and eggs of endoparasites may be found in feces , which aids in the detection of the parasite in the human host while also providing the means for the parasitic species to exit ...
Dientamoebiasis is a medical condition caused by infection with Dientamoeba fragilis, a single-cell parasite that infects the lower gastrointestinal tract of humans. It is an important cause of traveler's diarrhea, chronic abdominal pain, chronic fatigue, [citation needed] and failure to thrive in children.
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