Species in Protozoa

Question 1

Trypanosoma brucei

Answer 1

Parasitic protest species that causes African trypanosomiasis (Sleeping sickness) in humans and nagana in animals in Africa

Question 2

What are the two hosts for Trypanosoma brucei?

Answer 2

1. Insect vector
2. Mammalian host

Question 3

What is the diagnostic stage for Trypanosoma brucei?

Answer 3

Blood trypomastigotes

Question 4

What does Trypanosoma brucei brucei exclusively infect?

Answer 4

Animals

Question 5

What are some symptoms of Trypanosoma brucei gambiense?

Answer 5

-apathy, mental dullness, lack of coordination
-paralysis, convulsions
-increasing sleepiness
-coma, death
(chronic)

Question 6

What are some symptoms of Trypanosoma brucei rhodesiense?

Answer 6

-Rapid weight loss
-Death in a few months
(acute and die fast)

Question 7

How do you diagnose Trypanosoma brucei?

Answer 7

-Presence of trypomastigotes in any body fluid
-Card agglutination trypanosomiasis test (CATT)

Question 8

What are some treatments for Trypanosoma brucei gambiense?

Answer 8

-Pentamidine in early stages
-Melarsoprol in late stages
-Eflornithine in advanced stages
-Combination of eflornithine and nifruimox is first line of treatment for advanced stages

Question 9

Where is Trypanosoma brucei gambiense found?

Answer 9

Central/western africa

Question 10

Where is Trypanosoma brucei rhodesiense found?

Answer 10

southern and eastern africa

Question 11

What is the scientific name for the Tsetse fly?

Answer 11

Glossina spp.

Question 12

What does Trypanosoma cruzi cause?

Answer 12

Chagas disease

Question 13

What is the vector for Trypanosoma cruzi?

Answer 13

Triatomids
-kissing bugs
-cone-nosed bugs
-Reduviidae

Question 14

Trypanosoma cruzi is most often acquired through contact with _______ of infected triatomine bug.

Answer 14

feces

Question 15

Where is Trypanosoma cruzi endemic of?

Answer 15

Mexico, central/south america

Question 16

What is a chagoma?

Answer 16

-Small red nodule at inoculation site with swelling of local lymph nodes; usually on face or trunk; contains trypomastigotes
-Associated with T. cruzi
-early;acute (~8 weeks)

Question 17

Romana’s sign

Answer 17

-edema of eyelid and conjunctiva
-swelling of preauricular lymph notes, usually unilateral; contain amastigotes
-Associated with T. cruzi
-early;acute (~8 weeks)

Question 18

Pseudocysts

Answer 18

-Throughout body, especially cardiac muscle cells
-anemia, weakness, nervous disorders, chills, musclel/bone pain, heart failure, fever
-Associated with T. cruzi
-late;acute

Question 19

Which parasite can cause short-term diarrhea?

Answer 19

Cryptosporidium parvum

Question 20

In Toxoplasma gondii, how do intermediate hosts get this parasite?

Answer 20

1. Ingest oocysts
2. Ingest bradyzoites in meat
3. Transplacental/transmammary transfer of tachyzoites

Question 21

What is the definitive host for Sarcocystic cruzi?

Answer 21

Carnivores (dogs)