Exam 3 -- Protozoa 2

Question 1

What is the vector for Trypanosoma brucei gambiense? And Trypanosoma brucei rhodesiense?

Answer 1

Tsetse fly (female and male) for both

Question 2

What disease can Trypanosoma brucei rhodesiense cause?

Answer 2

Acute… Fatal.

Question 3

What disease can Trypanosoma brucei gambiense cause?

Answer 3

Chronic… Sleeping sickness

Question 4

What blood stage is Trypanosoma brucei gambiense and Trypanosoma brucei rhodesiense?

Answer 4

trypomastigote

Question 5

What is the tissue stage of Trypanosoma brucei gambiense and Trypanosoma brucei rhodesiense?

Answer 5

N/A

Question 6

What is the vector stage of Trypanosoma brucei gambiense and Trypanosoma brucei rhodesiense?

Answer 6

epimastigoite

Question 7

What binary fission occurs in Trypanosoma brucei gambiense and Trypanosoma brucei rhodesiense?

Answer 7

Blood of the host and the vector

Question 8

What is the life cycle of Trypanosoma brucei gambiense and Trypanosoma brucei rhodesiense?

Answer 8

Tsetse fly takes blood and inject trypomastigote -> In the host blood, they multiply to produce more trypomastigote -> Tsetse fly takes blood meal with trypomastigote -> In the fly, trypomastigote transforms into epimastigote -> Multiply -> Trypomastigote (ready for new host)

Question 9

What is the vector of the Trypanosoma cruzi? Where is this found?

Answer 9

Kissing bug (through the feces to open wound)

Question 10

What is the disease is caused by Trypanosoma cruzi?

Answer 10

Chagas disease; cardiac form; colonmegaly (digestive system)

Question 11

What is the blood stage of Trypanosoma cruzi?

Answer 11

Trypomastigote

Question 12

What is the tissue stage of Trypanosoma cruzi?

Answer 12

Amastigoite

Question 13

What is the vector stage of Trypanosoma cruzi?

Answer 13

Epimastigoite

Question 14

Where does binary fission occur in Trypanosoma cruzi?

Answer 14

In the tissues of the host and the vector.

Question 15

What is the life cycle of Trypanosoma cruzi?

Answer 15

Kissing bug takes a blood meal and leaves trypomastigote within the feces on the host skin -> Invades tissue -> In the host tissues they multiply to produce more amastigote -> Transform into trypomastigote and go to the blood to another organ -> Kissing bug takes blood meal with trypomastigote -> In the fly trypomastigote transforms in epimastigote -> Multiply -> Trypomastigote -> (ready for the new host)

Question 16

What is the vector of Leshmania donvani and Leshmani maxicana?

Answer 16

Female of sandfly

Question 17

What is the disease caused by Leshmania donvani and Leshmani maxicana?

Answer 17

Kala-azar disease (hepatosplenomegaly)

Question 18

What is the blood stage of Leshmania donvani and Leshmani maxicana?

Answer 18

Promastigote

Question 19

What is the tissue stage of Leshmania donvani and Leshmani maxicana?

Answer 19

Amastigote (Macrophages)

Question 20

What is the vector stage of Leshmania donvani and Leshmani maxicana?

Answer 20

Promastigote

Question 21

What binary fission occurs in Leshmania donvani and Leshmani maxicana?

Answer 21

In the host macrophages and the vector.

Question 22

What is the life cycle of Leshmania?

Answer 22

Sandfly takes a blood meal and injects promastigote -? Invades macrophages and transform into amastigote -> In the host macrophages they multiply to produce more amastigote -> Transform into promastigote and go with the blood to another organ -> Sandfly takes blood meal with macrophages with amastigote -> In the fly, amastigote transforms into promastigote -> Multiply -> (Ready for the new host)

Question 23

What is the transmission path for Chilomastix mesnili?

Answer 23

The oro-fecal pathway from contaminated food/water

Question 24

Chilomastix mesnili moves by what mechanism?

Answer 24

Flagellum

Question 25

What are the trophozoite characteristics for Chilomastix mesnili?

Answer 25

* Pyriform shape; * 3 anterior flagellum; * Cytostomal cleft

Question 26

What are the cyst characteristics of Chilomastix mesnili?

Answer 26

Lemon shape cap

Question 27

What is the pathogenicity of Chilomastix mesnili?

Answer 27

Harmless - up to diarrhea

Question 28

What is the transmission path of Giardia lamblia?

Answer 28

The oro-fecal pathway from contaminated food/water

Question 29

Giardia lamblia moves by what mechanism?

Answer 29

Flagellum

Question 30

What are the trophozoite characteristics for Giardia lamblia?

Answer 30

* Tear drop shape; * 4 pairs of flagellum; * axostyle; * 2 nuclei

Question 31

What are the characteristics of the cyst for Giardia lamblia??

Answer 31

* 4 nuclei; * axostyle; * infective stage

Question 32

What is the transmission path for Trichomonas vaginalis?

Answer 32

Sexual intercouse

Question 33

Trichomonas vaginalis moves by what mechanism?

Answer 33

Flagellum

Question 34

What are the trophozoite characteristics of Trichomonas vaginalis?

Answer 34

* 4 anterior + 1 posterior undulating flagellum; * axostyle

Question 35

What are the cyst characteristics of Trichomonas vaginalis?

Answer 35

NO CYST

Question 36

What is the pathogenicity of Trichomonas vaginalis?

Answer 36

* Asymptomatic itching/discomfort of prostatitis; * Vaginal discharges

Question 37

What is the transmission path for Dientamoeba fragilis?

Answer 37

1- Oro-fecal pathway from contaminated food/water with trophozoite; 2- Trophozoite along with Ascaris or vermicularis eggs (hyper parasitized)

Question 38

Dientamoeba fragilis moves by what mechanism?

Answer 38

Pseudopodia

Question 39

What are the trophozoites characteristics of Dientamoeba fragilis?

Answer 39

1 or 2 nuclei (mostly) that are bound by the mitotic spindle.

Question 40

What are the cyst characteristics of Dientamoeba fragilis?

Answer 40

NO CYST

Question 41

What is the pathogenicity of Dientamoeba fragilis?

Answer 41

Harmless - up to diarrhea