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Flashcards in Parasites GI I Deck (57):
1

What is the most common parasitic infection in the US?

Giardia

2

What are the four classes of parasites?

Ameba-pseudopodia
Flagellates
Sporozoans
Ciliates

3

How do sporozoans move about?

Through tank tread-like stuff

4

How do most protozoa produce?

Asexually by binary fission

5

What is the process though with protozoa reproduce asexually? Sexually?

Schizogony = asexually
Sporogoy = sexually

6

What allows protozoa to have a low infectious dose?

The ability to reproduce asexually

7

How are all of the GI protozoa infections transmitted?

Fecal-oral route

8

What allows many protozoato pass through the stomach?

Cysts

9

What is organism that causes amebiasis?

Entamoeba histolytica

10

How does the cyst form of entamoeba look?

Has four nuclei

11

Are people who poop out the trophozoite form of protazoans infectious? Why or why not?

No, because the trophozoites are susceptible to the environment

12

What are the two diseases caused by entamoeba histolytica?

Disseminated disease
Intestinal disease

13

Which protozoan can exit the intestines via the flask-like projections, and enter the systemic circulation? What is the sequalea of this?

Entamoeba histolytica

Liver abscesses

14

What is the infectious form of entaamoeba histolytica?

Spore form

15

Who's at greater risk of shedding infectious forms of entaamoebae histolytica: symptomatic or asymptomatic individuals?

Asymptomatic individuals due to cyst shedding

16

What is the symptom that is almost always present in pts with amebisais?

Hematochezia

17

Does amebiasis usually have a fever associated with it?

no

18

Which protozoan causes a characteristic flask shaped lesion?

Entamoeba histolytica

19

Why does sepsis usually result with amenbiasis?

the protozoa penetrate the intestinal wall, leading to infiltration of bacteria into the blood

20

How do you diagnose amebiasis?

Stool examination or antigen detection

or biopsy if no longer intestinal

21

What are the symptoms of amebiasis if it spreads to a systemic infection?

Abdominal TTP

22

An amebiasis patient who produces formed stools has which type of entamoeba histolytica in their system: the spore form or the trophozoite form?

Cyst form

23

An amebiasis patient who produces watery diarrhea has which type of entamoeba histolytica in their system: the spore form or the trophozoite form?

Trophozoite form

24

Does giardia have a cyst form and a trophozoite form, or just a trophozoite form?

Both cyst and trophozoite form

25

How many nuclei does Giardia have?

Two (like its starting back at you)

26

What is the route of transmission for Giardia?

Fecal-oral route

27

Does Giardia invade the intestinal wall, or just adhere?

Just adheres

28

Why does Giardia occur in children?

Because they are disgusting

29

What is giardia usually associated with?

Bodies of water

30

What is the MOA of how Giardia produces diarrhea?

Sticks to epithelial wall and prevents water reuptake

31

Does Giardia cause dysentery?

No

32

What are the symptoms of Giardiasis? (6)

Diarrhea
Malaise
Flatulence
Foul smelling stool
N/v

33

Is there fever with Giardiasis?

No

34

How long does Giardiasis usually last?

Weeks

35

What is the consequence of chronic giardiasis?

Malnutrition

36

What is the only ciliated organism that infects humans? What is the disease that it causes?

Balantidium coli

Balantidiasis

37

What does Balantidium coli look like?

Pacman

38

What is the route of infection for balantidium coli? Does it produce cysts?

Fecal-oral route with cyst formation

39

How common is balantidiasis?

Super rare

40

What is the reservoir for balantidiasis?

Pigs

41

What are the acute symptoms of balantidiasis?

Bloody diarrhea or constipation

42

What is the disease that cryptosporidium parvum causes?

Cryptosporidiosis

43

How does Cryptosporidium parvun move about?

Trophozoite

44

What is the difference in the cryptosporidium parvum's life cycle compared to other protozoan infections?

Reproduces sexually in intestines, and produces oocysts

45

What is the form that cryptosporidium parvum takes in the environment?

Oocyst

46

Which unique stain can stain cryptosporidium parvum?

Acid fast

47

What is the reservoir of cryptosporidium?

Cattle

48

What is histologically significant about cyclospora? How can you distinguish it between cryptosporidium parvum?

Fluoresces under UV light

49

Which parasitic infection is associated with HIV/AIDS so much that prophylaxis is indicated form them?

Cryptosporidosis

50

What are the symptoms of cryptosporidosis? Will there be blood?

Profuse diarrhea
NO blood

51

What is isopora belli associated with?

Water bodies

52

What is significant about the isopora belli life cycle?

Reproduces sexually in the intestines

53

What are the symptoms of isopora belli infx?

Fever, diarrhea, weight loss, electrolyte imbalance

54

What are cyclospora associated with?

Raspberries from Guatemala

55

How do you diagnose cyclospora?

Fluoresce them under UV light

56

What are the protozoa that we don't know much about, but are found with increasing frequency among HIV/AIDS patients?

Microsporidiosis

57

What are the symptoms of infection with microsporidia?

Chronic diarrhea, weight loss