Intestinal Parasite I (PART 3)

Question 1

What is the ‘fragile, enteric ‘amoeba’ with two nuclei’ but is NOT an amoeba

Answer 1

Dientamoeba fragilis

Question 2

Dientamoeba fragilis:

- what disease does it cause

Answer 2

dientamoebiasis

Question 3

Dientamoeba fragilis:

- infectious form

Answer 3

Troph

Question 4

Dientamoeba fragilis:

- appearance of troph

Answer 4

WITHOUT external flagella, irregular rounded shape, two nuclei, “dirty” cytoplasm

Question 5

Dientamoeba fragilis:

- appearance of cyst

Answer 5

NO CYST FORM

Question 6

Another name for pathogenic apicomplexa

Answer 6

sporozoa

Question 7

How do pathogenic apicomplexa infect?

Answer 7

invade and multiply within epithelial cells

Question 8

Which are second most commonly diagnosed intestinal parasites in the US?

Answer 8

Cryptosporidium spp

Question 9

Cryptosporidium spp:

- Habitat

Answer 9

Waterborne - big outbreaks in Milwaukee, WI

Question 10

Cryptosporidium spp:

- how is it transmitted

Answer 10

fecal-oral rout, food, person to person contact

Question 11

Cryptosporidium spp:

- Common settings (4)

Answer 11

• municipal water supply-accciated outbreaks (Milwaukee)
• Children in daycare
• people in contact with farm animals
• people with AIDS who have unrelenting, watery diarrhea

Question 12

Cryptosporidium spp:

- infectious form

Answer 12

oocyst

Question 13

Cryptosporidium spp:

- significant symptom

Answer 13

profuse watery diarrhea (up to 10L/day)

Question 14

Cryptosporidium spp:

- Test of choice

Answer 14

EIA

Question 15

Cryptosporidium spp:

- what color do they stain in a modified kinyoun stain?

Answer 15

red because they are ACID-FAST

Question 16

Cryptosporidium spp:

- Oocyst appearance

Answer 16

4-6 micrometers, have 4 crescent-shaped sporozoite present within them