Giardia duodenalis

Question 1

Does Giardia duodenalis have zoonotic potental?

Answer 1

Yes

Question 2

DH and IH

Answer 2

DH: Wide range of animals
IH: None

Question 3

Type of Life cyle is indirect or direct?

Answer 3

Direct

Question 4

Stages in life cycle:

Answer 4

Trophozoite: motile stage
Two nuclei and flagella
Cysts in fecal–> 4 nuclei and no flagella

Question 5

use _____ smear to look for ____ ______ with Lugol’s Iodine Staining

Answer 5

direct; motile trophozoites (remember, they have flagella)

Question 6

Use fecal float to see ____ in feces… with what solution used in the floatation?

Answer 6

cysts; Zinc sulfate (SG 1.18)

Question 7

Infective stage for DH is

Answer 7

cyst in feces

Question 8

Site of infection:

Answer 8

Trophozoites mainly in SI and encyst in Large intestine
Cyst stage excreted in feces
“Intermittent shedder”

Question 9

Route of infection:

Answer 9

fecal to oral transmission

Question 10

PPP

Answer 10

5-7 days

Question 11

Two assemblages with Giardia duodenalis include:

Answer 11

Assemblage A: Giardia duodenalis with main host being humans and other animals (ZOONOTIC!)
Assemblage E: Giardia bovis with main host being hoofed animals

Question 12

Clinical signs of Giardia duodenalis:

Answer 12

Usually younger animals, GI signs, usually self-limiting and assoc. with concurrent infections

Question 13

Giardia looks like what under the microscope?

Answer 13

A falling leaf!!