GI Parasites

Question 1

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

Answer 1

ectoparasite

Question 2

Organism in which the adult or sexually mature parasite live

Answer 2

Definitive host

Question 3

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

Answer 3

Intermediate host

Question 4

Causes giardiasis from infected water

Answer 4

Giardia lamblia

Question 5

Diagnostic: cysts in stool

Answer 5

Giardia lamblia

Question 6

Opportunistic cryptosporidiosis from contaminated water

Answer 6

Cryptosporidium parvum

Question 7

Obligate intracellular parasite

Answer 7

Cryptosporidium parvum

Question 8

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

Answer 8

Cryptosporidium parvum

Question 9

Seen using a modified acid-fast stain

Answer 9

Cryptosporidium parvum

Question 10

Person-to-person transmission because oocysts are immature

Answer 10

Chryptosporidium parvum

Question 11

Parasitizes the small intestinal mucosa causing diarrhea for several weeks

Answer 11

Cyclospora cayetanensis

Question 12

Most common from eating contaminated foods

Answer 12

Cyclospora cayetanensis

Question 13

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

Answer 13

Cyclospora cayetanensis

Question 14

Causes a flask shaped ulcer

Answer 14

Entamoeba histolytica

Question 15

Can cause liver abscess

Answer 15

Entamoeba histolytica

Question 16

Frequent tenesmus and amoebic dysentery

Answer 16

Entamoeba histolytica

Question 17

High worm burden causes eosinophilia

Answer 17

Ascaris lumbricoides

Question 18

Progresses in the lungs and moves to intestine

Answer 18

Ascaris lumbricoides

Question 19

Includes pulmonary systems

Answer 19

Ascaris lumbricoides

Question 20

Prevalent in cold and temperate climates

Answer 20

Enterobius vermicularis

Question 21

Most common helminth infection in the US

Answer 21

Enterobius vermicularis

Question 22

Mature very fast, 4-6 hours

Answer 22

Enterobius vermicularis

Question 23

Major cause of anemia in the tropics

Answer 23

Hookworm

Question 24

3 species of hookworm

Answer 24

Necator americanus, Acyclostoma duodenale and celanicum

Question 25

Nematode infection of the immunosuppressed

Answer 25

Strongyloides stercoralis

Question 26

Burrows into intestinal wall or perianal skin

Answer 26

Strongyloides stercoralis

Question 27

Extremely high infection rate in southeastern US

Answer 27

Trichuris trichiura

Question 28

Can cause a prolapse of the rectum

Answer 28

Trichuris trichiura

Question 29

Cestode found in pork

Answer 29

Taenia solium

Question 30

Cestode found in beef

Answer 30

Taenia saginata

Question 31

Intestine dwelling fluke

Answer 31

Fasciolopsis buski

Question 32

Liver dwelling fluke

Answer 32

Fasciola hepatica

Question 33

Found in humans and pigs of southeast asia

Answer 33

fasciolopsis buski

Question 34

Parasite of sheep

Answer 34

Fasciola hepatica

Question 35

Fluke found in fish crabs or crayfish

Answer 35

Clonorchis sinensis

Question 36

Causes Chagas disease

Answer 36

Trypanosoma cruzi

Question 37

Acute stage of chagas diseases

Answer 37

One eye will swell

Question 38

Intermediate stage of chagas disease

Answer 38

Asymptomatic

Question 39

Chronic stage of chagas disease

Answer 39

Cardiac problems and enlarged esophagus