ID: Protozoal & Helminth Infections Flashcards Preview

Unit 6: Pathology > ID: Protozoal & Helminth Infections > Flashcards

Flashcards in ID: Protozoal & Helminth Infections Deck (30)
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1
Q

what causes the recurrent paroxysm fever/chlils seen in malaria

A

rupture of infected RBCs cause the release of pyogenes

2
Q

what type of malaria causes the most severe disease

A

P. falciparum

3
Q

what is the most important virulence of p. falciparum

A

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

4
Q

what organism

found in cat liter because cats are the final host

A

toxoplasmosis

another reason to never have a cat

5
Q

what protozoa

produces flask/bottle neck ulcers

A

entamoeba histolytica

6
Q

what protozoa

can produce liver abscesses

A

entamoeba histolytica

7
Q

what transmits American trypanosemiasis

A

triatominae bug=reduvid bug=kissing bug

8
Q

what transmits african trypanosomiasis (sleeping sickness)

A

tsetse fly

9
Q

what african trypanosomiasis:

infection will be chronic lasting longer than 1 year

A

T. bruci gambienae

10
Q

what african trypanosomiasis:

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

A

T. brucei rhodesiense

11
Q

what is the most destructive helminthic infection? why?

A

shistosomiasis because of the granulomatous response it causes

12
Q

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

A

elephantiasis

lymphatic filariasis

13
Q

what is the causative agent in river blindness

A

onchocerca volvulus

14
Q

what transmits onchocerciasis (river blindness) to humans

A

the black fly

15
Q

what is the most common helminth infection in humans

A

ascaroasus

16
Q

which of the intestinal nematodes can you see autoinfection with

A

strongyloidiasis (threadworm)

17
Q

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

A

S. haematobium

18
Q

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

can see portal HTN

A

S. mansoni

S. japonicum

19
Q

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

A

clonorchus

biliary obstruction

20
Q

what tapeworm (cestode) can cause b12 deficiency

A

Diphyllobethrium latum

fish tape worm

21
Q

what is the classic triad seen in toxoplasmosis

A
  1. chorioretinitis
  2. hydrocephalus
  3. intracranial calcifications
22
Q

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

A

48 hours

23
Q

how long is the fever cycle in P. malariae

A

72 hours

24
Q

what protozoa

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

A

babesia

25
Q

what is romana sign and when is it seen?

A

unilateral periorbial swelling indicating an acute infection with chagas disease

26
Q

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

A

spiking fevers
hepatosplenomegaly
pancytopenia

27
Q

what protozoa

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

A

trichomonas vaginalis

28
Q

what parasite can cause brain cysts and seizure

“adult onset epilepsy”

A

T. solium (pork tapeworm)

29
Q

what parasite causes myalgias and periorbital edema

A

trichinella spiralis

30
Q

what parasite

“perianal pruitis”

A

enterobius