Intestinal Parasite II Flashcards
Cyclospora cayetanensis:
- geographical distribution
most common in tropical and subtropical regions, exported to other regions (not common in industrialized nations)
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
Cyclospora cayetanensis:
- infectious form
sporulated oocyst
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)
Cyclospora cayetanensis:
- Can be shed _______ so get more than one stool specimen
intermittent
Cyclospora cayetanensis:
- Wet mount are useless, but oocysts are _______ and _______ when excited with certain wavelengths of light
- acid-fast
- autofluoresce
Cyclospora cayetanensis:
- unsporulated oocysts are how big?
- are they bigger or smaller than cryptosporidium
- 8-10 micrometer
- bigger than crypto (4-6)
Cyclospora cayetanensis:
- oocyst appearance
small coccidian parasite, round, acid fast (can have ghost cells in af); stain red; no sports, wrinkled and crinkled
Cystoisospora belli:
- disease caused
cystoisosporiasis
Cystoisospora belli:
- who is it usually seen in?
immunocompromised patients, especially those with AIDS
Cystoisospora belli:
- infectious form
mature oocyst
Cystoisospora belli:
- significant symptoms
Eosinophilia may be present
Cystoisospora belli:
- it will ________ when excited with UV light
autofluoresce
Cystoisospora belli:
- oocyst appearance
large, ellipsoidal, contain 1 sporoblast (pig in a blanket)
Sarcocystis hominis and suihominis:
- disease incidence
sarcocystosis
