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Giardia (/ dʒ iː ˈ ɑːr d i ə / or / ˈ dʒ ɑːr d i ə /) is a genus of anaerobic flagellated protozoan parasites of the phylum Metamonada that colonise and reproduce in the small intestines of several vertebrates, causing the disease giardiasis.
Giardiasis is a parasitic disease caused by Giardia duodenalis (also known as G. lamblia and G. intestinalis). [3] Infected individuals who experience symptoms (about 10% have no symptoms) may have diarrhea, abdominal pain, and weight loss. [1]
The U.S. National Institutes of Health Gastrointestinal Parasites Lab studies Giardia almost exclusively. [citation needed] However, Giardia experienced an extraordinarily long term of emergence, from its discovery in 1681 until the 1970s when it was fully accepted that infection with Giardia was a treatable cause of chronic diarrhea:
Giardia duodenalis, also known as Giardia intestinalis and Giardia lamblia, is a flagellated parasitic protozoan microorganism of the genus Giardia that colonizes the small intestine, causing a diarrheal condition known as giardiasis. [1] [2] [3] The parasite attaches to the intestinal epithelium by a ventral disc (syn.
All metamonads are anaerobic (many being aerotolerant anaerobes), and most members of the four groups listed above are symbiotes or parasites of animals, as is the case with Giardia lamblia which causes diarrhea in mammals. [4]
The common intestinal parasite Giardia duodenalis (synonyms Giardia lamblia, G. intestinalis) was once considered to be a descendant of a protist lineage that predated the emergence of meiosis and sex. However, researchers found G. duodenalis to have a core set of genes that function in meiosis and that are widely present among sexual ...
Giardia lamblia virus; Cryo-EM reconstruction of Giardia lamblia virus (GLV) particle color based on distance from center Virus classification (unranked):
The bacteria enterotoxigenic Escherichia coli (ETEC) are typically the most common except in Southeast Asia, where Campylobacter is more prominent. [2] [3] About 10 to 20 percent of cases are due to norovirus. [3] Protozoa such as Giardia may cause longer term disease. [3] The risk is greatest in the first two weeks of travel and among young ...