Giardia lamblia


Giardia lamblia
or G. intestinalis

Single-celled protozoan parasite.

Pear-or beet-shaped, the cells have two nuclei and eight flagella and attach with a sucking organ to human intestinal mucous membranes. They cause the disease giardiasis. Generally spread when traces of human feces containing the parasite are ingested, giardiasis is most common among children in close contact with other children, but it also occurs among adults. Diarrhea, pain, and distension of the stomach may occur. It is common wherever there is contamination of domestic or surface water in lakes, rivers, and reservoirs, and it is a major cause of diarrhea worldwide. Beaver feces are often responsible for giardiasis among campers who take water from lakes and rivers.

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also called  G. intestinalis 
 single-celled parasite of the order Diplomonadida. Like those of other diplomonads (diplomonad), the cells of G. lamblia have two nuclei and eight flagella. The parasite attaches to human intestinal mucosa (mucous membrane) with a sucking organ, causing the diahrreal condition known as giardiasis. Acute giardiasis is a common disease among hikers, campers, and travelers to undeveloped countries who drink untreated water, and it is also quite common among children in day-care centres and people who use crowded public swimming areas. The clinical symptoms include large, foul-smelling, fatty stools, stomach cramps, and bloating. The parasite is passed directly from the stools of infected people or animals to persons who ingest infected water, food, or other material. Symptoms appear after a 10-day incubation period and may persist for weeks. The disease is generally mild and self-limiting, though infected children can develop chronic malabsorption of nutrients from the intestines. It is treated with antimicrobial drugs and with fluids to prevent dehydration.

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Universalium. 2010.

Look at other dictionaries:

  • Giardia lamblia — Giardia intestinalis Giardia intestinalis …   Wikipédia en Français

  • Giardia lamblia — Taxobox color = khaki name = Giardia lamblia image width = 200px image caption = Giardia cell, SEM domain = Eukaryota phylum = Metamonada ordo = Diplomonadida familia = Hexamitidae genus = Giardia species = G. lamblia binomial = Giardia lamblia… …   Wikipedia

  • Giardia lamblia —   Giardia intestinalis …   Wikipedia Español

  • Giardia lamblia — Giardia intestinalis Giardia intestinalis Systematik ohne Rang: Fornicata ohne Rang: Eopharyngia …   Deutsch Wikipedia

  • Giardia lamblia — см. Lamblia intestinalis …   Большой медицинский словарь

  • Giardia lamblia — o G. intestinalis Protozoo parásito unicelular. Las células piriformes tienen dos núcleos y ocho flagelos y se adhieren con una ventosa a la mucosa intestinal humana. Causan la enfermedad llamada giardiasis. Se disemina por lo general por… …   Enciclopedia Universal

  • Giardia lamblia — former name for G. intestinalis …   Medical dictionary

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