Entamoeba hystolitica

Question 1

Classification:

Answer 1

Protozoa

Question 2

Direct or indirect:
Hosts:

Answer 2

Direct life cycle

Humans are intermediate hosts.

Also common in non human primates.

Question 3

Transmission and life cycle:

Answer 3

Cysts and trophozoites are passed in feces. You ingest cysts and excystation occurs releasing trophozoites.

Trophozoites multiply by binary fission and replicate in either trophozoites or cysts.

Can become invasive!

Question 4

Diagnosis:

Answer 4

Microscopy:
- hard to distinguish from dispar. Histolytica is able to ingest red blood cells.

Molecular:
- PCR

Serological:
- Antibodies only if parasite becomes invasive.