Parasitic infection of GI

Question 1

Intestinal Flagellate
Found in duodenum and jejunum of human
Watery, semisolid, greasy, bulky and foul smelling
Trophozoite and cyst

Answer 1

Giardia Lamblia

Question 2

Intestinal Ameoba
Flask-shaped ulcer
Mild Diarrhea or severe dysentery
Amebic Hepatitis/liver Abscess (anchovy paste)

Answer 2

Entameoba histolytica

Question 3

Intestinal Sporoza
Severe intractable Diarrhea
Treated with Paromomycin and Nitazoxamide

Answer 3

Cryptosporidium hominis

Question 4

Intestinal Sporoza
Caused by fresh produce (raspberries, mesclun, basil)
Shortening of Intestinal Villi
Treated with TMP-SMZ

Answer 4

Cyclospora

Question 5

Human roundworm
Intestinal Ascariasis
Can cause mechanical obstruction of the bowel and bile and pancreatic ducts
Loeffler’s Syndrome

Answer 5

Ascaris lumbricoides

Question 6

Human hookworm
Severe Anemia
Iron Deficiency Anemia
Ground itch
Male worms have copulatory bursa

Answer 6

Ancylostoma Duodenale

Necator Americanus

Question 7

Pinworm
Perianal pruritus
Scotch tape test reveals football shaped organism

Answer 7

Enterobius vermicularis

Question 8

Whipworm
Buggy whip appearance due to thicker posterior end
Causes profuse Bloody diarrhea, Cramps, tenesmus, rectal prolapse, appendicits

Answer 8

Trichuris trichiura

Question 9

Threadworm
Parthenogenic
Can enter the lungs and heart 
Larva currens
GI, Lungs, and skin symptoms

Answer 9

Stronglyloides stercoralis

Question 10

Intestinal and Tissue Nematode
larvae encyst in muscle tissue
Involves diaphragm, tongue, extraocular muscles, masseter, intercostals
Cause myalgia and weakness

Answer 10

Trichinella Spiralis

Question 11

Giant intestinal Fluke
Trematode
Metacercarial stage encysts on water chestnuts and red caltrops

Answer 11

Fasciolopsis buski

Question 12

Taenia saginata (trematode)

Answer 12

beef tapeworm

Cysticerci dont develop

Question 13

Taenia solium (cestode)

Answer 13

pork tapeworm
Humans are intermediate host
Cysticercosis

Question 14

Broad fish tapeworm
Pleroceroids (larvae) appears as white grain of rice on fish
Pernicious Anemia (Vit B12 malabsorption)

Answer 14

Diphyllobothrium latum

Question 15

Dwarf tapeworm
Most common tapeworm infection
Due to internal autoreinfection
Indirect and direct life cycle

Answer 15

Hymenolepsis nana

Question 16

Infects canids, felines and pet owners
Asymptomatic in adults
Causes diarrhea and restlessness in children

Answer 16

Dipylidium Caninum

Question 17

Soil transmitted Helminths

Answer 17

Nematode

Question 18

Loeffler’s Syndrome

Answer 18

Cough
Eosinophilia
Pulmonary Infiltrates

Question 19

Protozoa

Answer 19

Giardia Lamblia
E. histolytica
Cyptosporidium hominis
Cyclospora

Question 20

Nematode

Answer 20

Ascaris
Ancyolstoma & Necator
Entorbius
Trichuris
Strongyloides
Trichinella

Question 21

Trematode

Answer 21

Fasciolpsis buski

Taenia saginata

Question 22

Cestode

Answer 22

Taenia solium
Diphyllbothrium latum
Hymenolepsis nana
Dipylidium caninum

Question 23

Trematode

Answer 23

leaf-like and unsegmented

have heads with suckers but no hooks

Question 24

Cestode

Answer 24

tape-like and segmented

with suckers and, possibly, hooks

Question 25

Nematode

Answer 25

elongated and cylindrical

no suckers no hooks