ID: Protozoal & Helminth Infections

Question 1

what causes the recurrent paroxysm fever/chlils seen in malaria

Answer 1

rupture of infected RBCs cause the release of pyogenes

Question 2

what type of malaria causes the most severe disease

Answer 2

P. falciparum

Question 3

what is the most important virulence of p. falciparum

Answer 3

organism alters flow characteristics and adhesive properties of infected RBCs which adhere to endothelial cells of small blood vessels, obstruct blood vessels and cause tissue ischemia

Question 4

what organism

found in cat liter because cats are the final host

Answer 4

toxoplasmosis

another reason to never have a cat

Question 5

what protozoa

produces flask/bottle neck ulcers

Answer 5

entamoeba histolytica

Question 6

what protozoa

can produce liver abscesses

Answer 6

entamoeba histolytica

Question 7

what transmits American trypanosemiasis

Answer 7

triatominae bug=reduvid bug=kissing bug

Question 8

what transmits african trypanosomiasis (sleeping sickness)

Answer 8

tsetse fly

Question 9

what african trypanosomiasis:

infection will be chronic lasting longer than 1 year

Answer 9

T. bruci gambienae

Question 10

what african trypanosomiasis:

infection rapidly progresses and will kill you in 3-6 months

Answer 10

T. brucei rhodesiense

Question 11

what is the most destructive helminthic infection? why?

Answer 11

shistosomiasis because of the granulomatous response it causes

Question 12

what does W. bancrofti, B. Malayi and B. timori cause (all the same disease)

Answer 12

elephantiasis

lymphatic filariasis

Question 13

what is the causative agent in river blindness

Answer 13

onchocerca volvulus

Question 14

what transmits onchocerciasis (river blindness) to humans

Answer 14

the black fly

Question 15

what is the most common helminth infection in humans

Answer 15

ascaroasus

Question 16

which of the intestinal nematodes can you see autoinfection with

Answer 16

strongyloidiasis (threadworm)

Question 17

which of the schistosomas cause the bladder infection (which can lead to cancer)

Answer 17

S. haematobium

Question 18

which of the schistosomas cause the liver infection (“piprestream”) fibrosis seen in liver)

can see portal HTN

Answer 18

S. mansoni

S. japonicum

Question 19

what disease does Chinese liver fluke cause? what is a consequence of this disease?

Answer 19

clonorchus

biliary obstruction

Question 20

what tapeworm (cestode) can cause b12 deficiency

Answer 20

Diphyllobethrium latum

fish tape worm

Question 21

what is the classic triad seen in toxoplasmosis

Answer 21

1. chorioretinitis
2. hydrocephalus
3. intracranial calcifications

Question 22

how long is the fever cycle in P. vivax and P. ovale

Answer 22

48 hours

Question 23

how long is the fever cycle in P. malariae

Answer 23

72 hours

Question 24

what protozoa

transmitted by same tick as lyme (ixodes tick) and causes fever and hemolytic anemia

Answer 24

babesia

Question 25

what is romana sign and when is it seen?

Answer 25

unilateral periorbial swelling indicating an acute infection with chagas disease

Question 26

what are the 3 presenting signs of visceral leishmaniasis (kala azar)

Answer 26

spiking fevers
hepatosplenomegaly
pancytopenia

Question 27

what protozoa

foul smelling greenish discharge; itchy and burning that was acquired from bumping uglies last weekend

Answer 27

trichomonas vaginalis

Question 28

what parasite can cause brain cysts and seizure

“adult onset epilepsy”

Answer 28

T. solium (pork tapeworm)

Question 29

what parasite causes myalgias and periorbital edema

Answer 29

trichinella spiralis

Question 30

what parasite

“perianal pruitis”

Answer 30

enterobius