Intestinal Parasite II Flashcards Preview

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Flashcards in Intestinal Parasite II Deck (19):
1

Cyclospora cayetanensis:
- geographical distribution

most common in tropical and subtropical regions, exported to other regions (not common in industrialized nations)

2

Cyclospora cayetanensis:
- Who are the hosts
- how is it transmitted

- Humans are the only known host
- fecal oral mainly through food and water, NOT DIRECT CONTACT
- raspberries, basil, cilantro, and other fresh produce

3

Cyclospora cayetanensis:
- infectious form

sporulated oocyst

4

Cyclospora cayetanensis:
- people ingest ______ (mature) oocyst but ______ oocysts in fresh feces are not infectious

- sporulated
- unsporulated
(oocyst must mature in environment for several days before infectious)

5

Cyclospora cayetanensis:
- Can be shed _______ so get more than one stool specimen

intermittent

6

Cyclospora cayetanensis:
- Wet mount are useless, but oocysts are _______ and _______ when excited with certain wavelengths of light

- acid-fast
- autofluoresce

7

Cyclospora cayetanensis:
- unsporulated oocysts are how big?
- are they bigger or smaller than cryptosporidium

- 8-10 micrometer
- bigger than crypto (4-6)

8

Cyclospora cayetanensis:
- oocyst appearance

small coccidian parasite, round, acid fast (can have ghost cells in af); stain red; no sports, wrinkled and crinkled

9

Cystoisospora belli:
- disease caused

cystoisosporiasis

10

Cystoisospora belli:
- who is it usually seen in?

immunocompromised patients, especially those with AIDS

11

Cystoisospora belli:
- infectious form

mature oocyst

12

Cystoisospora belli:
- significant symptoms

Eosinophilia may be present

13

Cystoisospora belli:
- it will ________ when excited with UV light

autofluoresce

14

Cystoisospora belli:
- oocyst appearance

large, ellipsoidal, contain 1 sporoblast (pig in a blanket)

15

Sarcocystis hominis and suihominis:
- disease incidence

sarcocystosis

16

Sarcocystis hominis and suihominis:
- transmitted

by consumption of undercooked/contaminated meat

17

Sarcocystis hominis and suihominis:
- infectious form

?? oocyst

18

Sarcocystis hominis and suihominis:
- oocyst appearance

paired (shrink-wrapped) ovals

19

Sarcocystis hominis and suihominis:
- do these organisms autofluoresce?

YES