Giardia intestinalis

Question 1

Classification:

Answer 1

Protozoa

Question 2

Indirect or direct:
Hosts:

Answer 2

Direct life cycle

Humans are intermediate hosts.

Dogs and cats can also carry the parasite.

Question 3

Transmission and life cycle:

Answer 3

Trophozoites and cysts are passed in the feces. Ingestion takes place where cysts differentiate into trophozoites.

Trophozoites replicate through binary fission. Trophozoites attach to intestinal wall.

Trophozoites produce cysts that are shed through the stool again.

Question 4

Diagnosis:

Answer 4

Microscopy:
- detecting cysts

Molecular:
- PCR

Antigen detection.