GI Infections 9 Flashcards
________ is an intestinal sporozoa which has associations with fruits and vegetable contamination
cyclospora cayetanensis
_____ is a coccidian protozoan that you use Ziehl Neelson stain for diagnosis
Cyclospora cayteanensis
the motile form of entamoeba histolytica is ______
trophozoite
trophozoites with irregular shape, one nuclei and can be crowded with ingested RBC”s is indicative of ______
E. Histolytica
balantidium coli is a ciliated/nonciliated protozoan;
what are the life cycle forms?
ciliated; cysts and trophozoites
what are some outcomes of entamoeba histolytica infection?
- asymptomatic
- intestinal amoebiasis
- liver abscess
asexual reproduction in C. Belli produces _______ within the ______
sexual reproduction produces _________
merozoites within the enterocytes
microgametes
intestinal sporozoa are diagnosed by ________ which identifies what life cycle form(s)?
acid fast staining of the stool that identifies oocysts or spores
going to a zoo is a risk factor for what protozoan infection? Describe its biology
Balantidium coli; ciliated protozoan
_______ form of entamoeba histolytica is present in the environment
cyst; NON motile form
describe the stools seen in Giardia infection and how you would do the samples
- foul smelling and greasy (steatorrhea)
- 3 different stool samples on 3 different days
ciliated trophozoite = _____
Balatidium coli
the nature of the stool is described to be a layer of blood and mucus over the feces for _____ dysentery
amoebic dysentery;
bacillary dysentery (shigellosis) has blood and mucous with little to no feces
_________ has a pseudopod
E. histolytica
trophozoites of _______ (organism) have a pear shaped appearance with 2 nuclei
Giardia intestinalis
once the _____ of C. belli are ingested, ______ are released in the SI
oocysts; sporozoites
what is the structure that gives giardia its motility?
flagella
is Giardia invasive?
no; it adheres to the wall and causes villi to flatten;
lactose intolerance, protein and fat malabsorption (steatorrhea) result
contact with _______ is a risk factor for B. coli infection
pigs or non human primates (zoos)
mucosa erosion by E. histolytica gives a characteristic ________ appearance
flask shaped lesion
bright red (fresh blood) is a feature of _________ dysentery (amoebiasis/shigellosis)
bacillary (shigellosis)
but with amebic dysentery, will see dark red blood because it is altered
autofluorescence of the oocysts is diagnostic of ________ (organism) infection
Cystoisospora belli
abdominal ultrasound rev healed amoebic liver abscess. aspirate of this abscess was an anchovy sauce appearance as red brown pus. What is the most likely pathogen
E. histolytica
E. histolytica infects as a _____ (life cycle form)
cyst