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| − | {{Taxobox | + | {{unfinished}} |
| − | |name =Giardia
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| − | |kingdom =Protista
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| − | |sub-kingdom =Biciliata
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| − | |phylum =Metamonada
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| − | |super-class =Eopharyngea
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| − | |class =Trepomonadea
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| − | |sub-class =Diplozoa
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| − | |super-order =
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| − | |order =Giardiida
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| − | |sub-order =
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| − | |super-family =
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| − | |family =Diplomonadidae
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| − | |sub-family =
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| − | |genus =Giardia
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| − | |species =
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| − | }} | |
| − | [[Image:Giardia lamblia life cycle.jpg|thumb|right|150px|''Giardia lamblia life cycle'' - Wikimedia Commons]]
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| − | [[Image:Giardia lamblia.jpg|thumb|right|150px|''Giardia lamblia'' - Janice Carr]]
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| − | [[Image:Giardia.jpg|thumb|right|150px|''Giardia'' - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona]]
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| − | [[Image:Giardia cyst.jpg|thumb|right|150px|''Giardia'' cyst - Courtesy of the Laboratory of Parasitology, University of Pennsylvania School of Veterinary Medicine]]
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| − | ==Overview==
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| − | These protozoan parasite are found in humans as well as wild and domestic animals. They are a common cause of severe [[Diarrhoea|diarrhoea]] as part of the clinical symptoms [[Giardiasis|giardiasis]].
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| − | ==Recognition==
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| − | ''Giardia spp.'' are flagellate protozoa with 8 flagella, 6 of which emerge from the body and are used in motility. They are 15-20μm long, pear shaped with a flat ventral surface. The most unique feature of this protozoa is the presence of a large adhesive disk in the flat surface that is used for attaching to the intestinal mucosa.
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| − | ==Life Cycle==
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| − | *Simple and direct
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| − | | |
| − | *Trophozoites attach to intestinal wall
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| − | | |
| − | *Reproduce by binary fission
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| | | | |
| − | *Form cysts of 10μm
| + | {{toplink |
| − | **Multi-nucleate cysts formed '''intermittently'''
| + | |backcolour = |
| − | **Immediately infective when passed in faeces
| + | |linkpage =Parasites |
| − | | + | |linktext =PARASITES |
| − | *Prepatent period of 5-6 days
| + | |pagetype=Bugs |
| − | | + | |sublink1=Protozoa |
| − | ==Pathogenesis== | + | |subtext1=PROTOZOA |
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| − | *Commonest cause of protozoal [[Diarrhoea|diarrhoea]] of man in the UK
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| − | *Common in domesticated animals
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| − | *Infections often asymptomatic in domestic animals
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| − | **Can cause villous atrophy leading to malabsorption
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| − | **Infection can persist for weeks to months if not treated
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| − | | |
| − | ==Epidemiology==
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| − | *Infection via direct oral-faecal route or through contaminated water source (water-borne)
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| − | *Wild animals may act as a source of infection for humans
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| − | **E.g. Beavers
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| − | | |
| − | *Divided into 7 species
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| − | **''G. duodenalis'' most commonly infects humans
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| − | ***Some subspecies are zoonotic
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| − | {{Learning
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| − | |flashcards = [[Giardia_Flashcards|Giardia Flashcards]] | |
| − | |Vetstream = [https://www.vetstream.com/canis/search?s=protozoa Protozoa] | |
| | }} | | }} |
| − | | + | <br> |
| − | | + | [[Image:Giardia cysts.jpg|thumb|right|150px|''Giardia'' cysts from gerbil faecea - H.D.A. Lindquist, U.S. EPA]] |
| − | {{unfinished}}
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| − | [[Category:Miscellaneous_Protozoa]]
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| − | [[Category:To_Do_-_Parasites]] | |
