Giardia lamblia

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Gi·ar·di·a in·tes·ti·na·lis

a flattened, heart-shaped motile flagellated organism (10-20 mcm in length) with eight flagella; it attaches itself to the intestinal mucosa by means of a pair of sucking organs; in humans it is usually asymptomatic except in cases of heavy infection, when it may interfere with absorption of fats and produce flatulence, steatorrhea, bloating, and acute discomfort; it is the common species of Giardia in humans but is also found in pigs, dogs, cats and other mammals. In dogs and cats, it is commonly associated with bloating, flatulence, tenesmus, weight loss, and malodorous mucoid or bloody soft frothy voluminous stools; can have severe clinical course in young, sick or immunocompromised hosts. Chronic infestations may lead to debilitation. May be asymptomatic.
Synonym(s): Giardia lamblia

Giardia lamblia

A species of Giardia found in humans, transmitted by ingestion of cysts in fecally contaminated water or food. In current usage, the preferred name for G. lamblia is now G. duodenalis. These organisms are found worldwide. The most common symptoms of G. duodenalis infection are diarrhea, fever, cramps, anorexia, nausea, weakness, weight loss, abdominal distention, flatulence, greasy stools, belching, and vomiting. Onset of symptoms begins about 2 weeks after exposure; the disease may persist for up to 2 to 3 months.

There is no effective chemoprophylaxis for this disease. Metronidazole, quinacrine, or tinidazole are preferred treatments. See: water, emergency preparation of safe drinking


Cysts or trophozoites can be identified in feces. Three consecutive negative tests are required before the feces are considered to be negative. Duodenal contents also can be examined by aspiration or string test, in which an ordinary string is swallowed and allowed to remain in the duodenum long enough for the protozoa to attach. On removal, it is examined for the presence of cysts or trophozoites. A stool antigen assay test detects Giardia. This involves either immunofluorescence or enzyme-linked immunosorbent assay.

See also: Giardia

Giardia lamblia

A type of protozoa with a whiplike tail that infects the human intestinal tract, causing giardiasis. The protozoa will not spread to other parts of the body.
Mentioned in: Giardiasis


Alfred, French biologist, 1846-1908.
Giardia lamblia - protozoa which causes diarrhea and abdominal discomfort.
giardiasis - infection with Giardia.
References in periodicals archive ?
However, because they are eliminated with faces, they are sometimes associated with pathogens that can transmit human diseases such as Escherichia coli, Pseudomonas aeruginosa, Salmonella spp, Staphylococcus, Shigellosis, Vibrio cholera and gastroenteritis (Campylobacter jejuni, Escherichia coli and Gardia Lamblia).
Esta segunda perspectiva implica una orientacion subjetivista del valor (Zeithaml, 1984, 1988; Monroe, 1992; Berry y Yadav, 1997; Woodruff, 1997; Flint, Woodruff y Gardia, 2002), que esta alineada con la orientacion subjetiva en el estudio de otros constructos que buscan la evaluacion del servicio, tales como la calidad del servicio y la satisfaccion.
The agency also issued a $4,900 fine to Gardia Construction, which supplied workers to Cotton Commercial, saying that the Houston contractor failed to regularly inspect job sites where its employees worked.
Israeli medical device maker Allium Medical (TASE: ALMD) has received confirmation from the US FDA that its Gardia embolic protection filter system has successfully achieved all the clinical study objectives at the early stage of recruitment of half the number of patients (120 patients out of 240), based on the interim results, the company said on Tuesday.
Braun, Blockade Medical, Contego Medical, Gardia Medical, InspireMD, ITGI Medical, Medikit, Merlin MD, MicroPort Scientific Corporation, Minvasys, Neuravi, Optimed, Phenox GmBH, Reverse Medical, Sequent Medical, Valor Medical
The Gram Sabha was conducted by Ward Member Shriram Gardia in the presence of Panchayat Extension Officer Pradhani Sabar.
After introducing us to her trusted assistants, Jim Gardia and Kathryn Cousar Rosenberg, Joan sat down with us and discussed in depth the strategy for making the play successful in L.
Al pozol maya se le dan usos nutricionales y preventivos de enfermedades intestinales, incluido el combate contra la gardia lambia y las amibas.
Pedro Cananas to Manuel Avila Camacho, June 19,1942, box 837, 550/44-16-11, Ramo Presidencial Manuel Avila Camacho (RP/MAC hereafter), Archivo General de la Nacion (AGN hereafter), Mexico City; Roberto Gardia de Le6n S.