Cysts

Question 1

Answer 1

Entamoeba histolytica

10-15um

morphologically indistinguishable from dispar

nuclei and chromatoid body in immature cysts

four nuclei in mature cysts

Question 2

Answer 2

Entamoeba coli - NON PATHOGENIC SO LESS MARKS

15-25um

up to 8 nuclei may be present

Question 3

Answer 3

Giardia duodenalis

cyst measures 10-15um

nuclei

axoneme

median bodies

remains of flagella may be seen

trophozoite has sucking disc, nuclei, median body, axoneme and flagella

clear colour and oval shaped

Question 4

Answer 4

Chilomastix mesnili

lemon shaped cyst

single nucleus may be seen

7-9um

Question 5

Answer 5

Endolimax nana

7-9

round to oval

4 hole like nuclei

Question 6

Answer 6

Iodamoeba buetschlii

9-15um

typical brown glycogen vacuole when stained with iodine

Question 7

Answer 7

Blastocystis hominis

8-15um

Question 8

Answer 8

Balantidium coli

macronucleus

cilia

thick cyst wall

trophozoite has cilia, cytostome, micronucleus and macronucleus