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− | {{Taxobox | + | {{unfinished}} |
− | |name =Giardia
| + | |
− | |kingdom =Protista
| + | {{toplink |
− | |sub-kingdom =Biciliata
| + | |backcolour = |
− | |phylum =Metamonada
| + | |linkpage =Parasites |
− | |super-class =Eopharyngea
| + | |linktext =PARASITES |
− | |class =Trepomonadea
| + | |pagetype=Bugs |
− | |sub-class =Diplozoa
| + | |sublink1=Protozoa |
− | |super-order =
| + | |subtext1=PROTOZOA |
− | |order =Giardiida
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− | |sub-order = | |
− | |super-family = | |
− | |family =Diplomonadidae | |
− | |sub-family = | |
− | |genus =Giardia | |
− | |species = | |
| }} | | }} |
− | [[Image:Giardia lamblia life cycle.jpg|thumb|right|150px|''Giardia lamblia life cycle'' - Wikimedia Commons]] | + | <br> |
| + | [[Image:Giardia cysts.jpg|thumb|right|150px|''Giardia'' cysts from gerbil faecea - H.D.A. Lindquist, U.S. EPA]] |
| + | [[Image:Giardia lamblia life cycle.jpg|thumb|right|150px|''Giardia lamblia'' life cycle - Wikimedia Commons]] |
| [[Image:Giardia lamblia.jpg|thumb|right|150px|''Giardia lamblia'' - Janice Carr]] | | [[Image:Giardia lamblia.jpg|thumb|right|150px|''Giardia lamblia'' - Janice Carr]] |
− | [[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
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− | **Multi-nucleate cysts formed '''intermittently'''
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− | **Immediately infective when passed in faeces
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− | *Prepatent period of 5-6 days
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− | ==Pathogenesis==
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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]]
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− | |Vetstream = [https://www.vetstream.com/canis/search?s=protozoa Protozoa]
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− | }}
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− | {{unfinished}}
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− | [[Category:Miscellaneous_Protozoa]]
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− | [[Category:To_Do_-_Parasites]]
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