3. Protozoa (I)

Question 1

Disease caused by E. histolytica

Answer 1

Amoebic dysentery (amoebiasis)

Question 2

IS of E. histolytica

Answer 2

Cysts

Question 3

DS of E. histolytica

Answer 3

Cysts

Trophozoites

Question 4

Number of nuclei of E. histolytica cysts

Answer 4

1-4 nuclei

Question 5

Diagnostic characteristic for E. histolytica trophozoites

Answer 5

Ingested RBCs

Question 6

Nonpathogenic protozoan identical to E. histolytica

Answer 6

Entamoeba dispar

Question 7

DS of Entamoeba coli

Answer 7

Cysts

Trophozoites

Question 8

Characteristic of E. coli cysts that differentiate it from E. histolytica

Answer 8

More than 4 nuclei (1-8 nuclei normally)

Question 9

Known as “small race” E. histolytica

Answer 9

Entamoeba hartmanni

Question 10

DS of E. hartmanni

Answer 10

Cysts

Trophozoites

Question 11

Protozoan with blot-like karyosome in both cyst and trophozoite stages

Answer 11

Endolimax nana

Question 12

DS of E. nana

Answer 12

Cysts

Trophozoites

Question 13

Protozoan with “basket of flowers”-shaped nucleus in cyst form

Answer 13

Iodameoba bütschlii

Question 14

Protozoan that stains well with iodine

Answer 14

Iodamoeba bütschlii

Question 15

DS of I. bütschlii

Answer 15

Cysts (recognizable glycogen mass using iodine stain)

Trophozoites

Question 16

Protozoan that causes granulomatous amoebic encephalitis (GAE)

Answer 16

Acanthamoeba spp.

Question 17

Protozoan that causes primary amoebic meningoencephalitis (PAM)

Answer 17

Naegleria fowleri

Question 18

Protozoan with a double cell-walled cyst form

Answer 18

Acanthamoeba spp.

Question 19

Disease caused by Acanthamoeba spp.

Answer 19

Granulomatous amoebic encephalitis (GAE)

Question 20

Disease caused by N. fowleri

Answer 20

Primary amoebic meningoencephalitis (PAM)

Question 21

Protozoans with no known cyst form

Answer 21

N. fowleri
D. fragilis
T. hominis
T. vaginalis

Question 22

The only amoeba with 3 known morphologic forms

Answer 22

N. fowleri:

• ameboid trophozoites (only form to exist in humans)
• flagellates
• cysts

Question 23

True/False. N. fowleri can be free living.

Answer 23

True

Question 24

Causes Traveler’s diarrhea

Answer 24

Giardia lamblia

Question 25

Other names of G. lamblia

Answer 25

G. intestinalis | G. duodenalis

Question 26

IS of G. lamblia

Answer 26

Cysts

Question 27

DS of G. lamblia

Answer 27

Cysts | Trophozoites

Question 28

Has trophozoites with sucking disk

Answer 28

G. lamblia

Question 29

Associated with E. vermicularis infections; may be transmitted via the eggs of helminth parasites

Answer 29

Dientamoeba fragilis

Question 30

IS of D. fragilis

Answer 30

Trophozoites

Question 31

Trophozoite has spiral groove

Answer 31

Chilomastix mesnili

Question 32

DS of C. mesnili

Answer 32

Cysts | Trophozoites

Question 33

Trophozoite has costa

Answer 33

Trichomonas hominis

Question 34

DS of T. hominis

Answer 34

Trophozoites

Question 35

Jerky motility of trophozoites

Answer 35

Trichomonas vaginalis

Question 36

IS of T. vaginalis

Answer 36

Trophozoites

Question 37

DS of T. vaginalis

Answer 37

Trophozoites

Question 38

The only amoeba pathogenic to the GI tract

Answer 38

Entamoeba histolytica