GI Infections 9

Question 1

________ is an intestinal sporozoa which has associations with fruits and vegetable contamination

Answer 1

cyclospora cayetanensis

Question 2

_____ is a coccidian protozoan that you use Ziehl Neelson stain for diagnosis

Answer 2

Cyclospora cayteanensis

Question 3

the motile form of entamoeba histolytica is ______

Answer 3

trophozoite

Question 4

trophozoites with irregular shape, one nuclei and can be crowded with ingested RBC”s is indicative of ______

Answer 4

E. Histolytica

Question 5

balantidium coli is a ciliated/nonciliated protozoan;

what are the life cycle forms?

Answer 5

ciliated; cysts and trophozoites

Question 6

what are some outcomes of entamoeba histolytica infection?

Answer 6

• asymptomatic
• intestinal amoebiasis
• liver abscess

Question 7

asexual reproduction in C. Belli produces _______ within the ______
sexual reproduction produces _________

Answer 7

merozoites within the enterocytes

microgametes

Question 8

intestinal sporozoa are diagnosed by ________ which identifies what life cycle form(s)?

Answer 8

acid fast staining of the stool that identifies oocysts or spores

Question 9

going to a zoo is a risk factor for what protozoan infection? Describe its biology

Answer 9

Balantidium coli; ciliated protozoan

Question 10

_______ form of entamoeba histolytica is present in the environment

Answer 10

cyst; NON motile form

Question 11

describe the stools seen in Giardia infection and how you would do the samples

Answer 11

• foul smelling and greasy (steatorrhea)

- 3 different stool samples on 3 different days

Question 12

ciliated trophozoite = _____

Answer 12

Balatidium coli

Question 13

the nature of the stool is described to be a layer of blood and mucus over the feces for _____ dysentery

Answer 13

amoebic dysentery;

bacillary dysentery (shigellosis) has blood and mucous with little to no feces

Question 14

_________ has a pseudopod

Answer 14

E. histolytica

Question 15

trophozoites of _______ (organism) have a pear shaped appearance with 2 nuclei

Answer 15

Giardia intestinalis

Question 16

once the _____ of C. belli are ingested, ______ are released in the SI

Answer 16

oocysts; sporozoites

Question 17

what is the structure that gives giardia its motility?

Answer 17

flagella

Question 18

is Giardia invasive?

Answer 18

no; it adheres to the wall and causes villi to flatten;

lactose intolerance, protein and fat malabsorption (steatorrhea) result

Question 19

contact with _______ is a risk factor for B. coli infection

Answer 19

pigs or non human primates (zoos)

Question 20

mucosa erosion by E. histolytica gives a characteristic ________ appearance

Answer 20

flask shaped lesion

Question 21

bright red (fresh blood) is a feature of _________ dysentery (amoebiasis/shigellosis)

Answer 21

bacillary (shigellosis)

but with amebic dysentery, will see dark red blood because it is altered

Question 22

autofluorescence of the oocysts is diagnostic of ________ (organism) infection

Answer 22

Cystoisospora belli

Question 23

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

Answer 23

E. histolytica

Question 24

E. histolytica infects as a _____ (life cycle form)

Answer 24

cyst