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Flashcards in GI Parasites Deck (39)
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1

A parasite that lives on the external surface of another living organism

ectoparasite

2

Organism in which the adult or sexually mature parasite live

Definitive host

3

Organism in which the parasite only lives during a period of its development

Intermediate host

4

Causes giardiasis from infected water

Giardia lamblia

5

Diagnostic: cysts in stool

Giardia lamblia

6

Opportunistic cryptosporidiosis from contaminated water

Cryptosporidium parvum

7

Obligate intracellular parasite

Cryptosporidium parvum

8

40% of cases have a recurrence of symptoms after initial resolution, then become chronic

Cryptosporidium parvum

9

Seen using a modified acid-fast stain

Cryptosporidium parvum

10

Person-to-person transmission because oocysts are immature

Chryptosporidium parvum

11

Parasitizes the small intestinal mucosa causing diarrhea for several weeks

Cyclospora cayetanensis

12

Most common from eating contaminated foods

Cyclospora cayetanensis

13

Seen using a modified acid-fast stain, larger than C parvum

Cyclospora cayetanensis

14

Causes a flask shaped ulcer

Entamoeba histolytica

15

Can cause liver abscess

Entamoeba histolytica

16

Frequent tenesmus and amoebic dysentery

Entamoeba histolytica

17

High worm burden causes eosinophilia

Ascaris lumbricoides

18

Progresses in the lungs and moves to intestine

Ascaris lumbricoides

19

Includes pulmonary systems

Ascaris lumbricoides

20

Prevalent in cold and temperate climates

Enterobius vermicularis

21

Most common helminth infection in the US

Enterobius vermicularis

22

Mature very fast, 4-6 hours

Enterobius vermicularis

23

Major cause of anemia in the tropics

Hookworm

24

3 species of hookworm

Necator americanus, Acyclostoma duodenale and celanicum

25

Nematode infection of the immunosuppressed

Strongyloides stercoralis

26

Burrows into intestinal wall or perianal skin

Strongyloides stercoralis

27

Extremely high infection rate in southeastern US

Trichuris trichiura

28

Can cause a prolapse of the rectum

Trichuris trichiura

29

Cestode found in pork

Taenia solium

30

Cestode found in beef

Taenia saginata