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22 Cards in this Set
- Front
- Back
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What conditions in the host stimulate Giardia cyst formation?
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increased PH and decreased cholesterol
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Are Giardia cysts passed with formed feces or diarrhea?
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formed
trophozoites are passed with diarrhea |
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Site of infection for Giardia Intestinalis?
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Small Intestine
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what is the pathogenesis of Giardia intestinalis?
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acute focal inflammation
villous atrophy diarrhea vomiting in dogs biliary inflammation or obstruction |
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Do Trichomonads form cysts?
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no only trophozoites
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Which species of Trichomonas infects birds?
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gallinae- mucosal lining of mouth, esophagus and crop of pigeons and doves.
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Pathogenesis of Trichomonas equi?
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persistent diarrhea in young horses
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Which Trichomonas species is an STD in humans?
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T. vaginalis
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What parasite can cause abortion in cows?
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Tritrichomonas foetus
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What are the hosts for Tritrichomonas foetus?
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cattle, ocassionally cats, possibly pigs
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Hosts for Histomonas meleagridis?
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DH: turkey, chickens...
PH: Heterakis gallinarum and earthworm |
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what are the sites of infection for Histomonas meleagridis?
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lumen of cecum
parenchyma of cecum and liver |
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3 routes of infection with Histomonas meleagridis?
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1. ingest trophozoite
2. ingest infected earthworm 3. ingest infected Heterakis gallinarum egg |
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Site of infection with Entamoeba histolytica?
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crypts and mucosa of large intestine
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What type of lesions do Entamoeba histolytica form?
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flask like lesions in liver lungs and intestine
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infection route for Naegleria fowleri?
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person swimming gets it up the nose
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What parasites cause skin infections and ulcers in immunocompromised people also corneal inflammation and opacity?
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Acanthamoeba
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Site of infection for Ichthyophthirus multifiliis?
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epidermis, cornea and gills
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infective stage of Ichthyophthirus multifiliis?
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theronts/tomites/swarmers
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Hosts of Balantidium coli?
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pig, man, primates, rats occasionally dogs
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infective stage of Balantidium coli?
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cyst- no mulitpication in cysts
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are Balantidium coli considered commensal?
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yes
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