Micro - Parasitology

Question 1

A man bitten by a tsetse fly has lymphadenopathy, fever, somnolence, and coma. What is the diagnosis?

Answer 1

African sleeping sickness

Question 2

What are the two laboratory diagnostic tests for amebiasis?

Answer 2

Serologic studies and stool examination for trophozoites or cysts; red blood cells in
the cytoplasm of entamoeba

Question 3

An AIDS patient presents with severe diarrhea. A stool sample shows cysts on
acid-fast stain. Diagnosis?

Answer 3

Cryptosporidium

Question 4

A camper with diarrhea presents with foul-smelling diarrhea. You see trophozoites
and cysts in the stool. Diagnosis and treatment?

Answer 4

Giardia lamblia; treatment is metronidazole

Question 5

A patient has hemolytic anemia and fever after a tick bite. On blood smear there
are “Maltese cross” forms. What is the diagnosis?

Answer 5

Babesiosis

Question 6

How is the diagnosis of malaria made?

Answer 6

Blood smear, trophozoite ring form, and red blood cell schizont with merozoites

Question 7

Praziquantel is used to treat diseases caused by which helminths?

Answer 7

Most of the cestodes and trematodes: Taenia solium, Diphyllobothrium latum,
Schistosoma, Clonorchis sinensis, and Paragonimus westermani

Question 8

Which helminthic infections are treated with mebendazole or pyrantel pamoate?

Answer 8

Ancylostoma duodenale(hookworm), Ascaris lumbricoides(giant roundworm), 
and Enterobius vermicularis(pinworm)

Question 9

Ivermectin is used to treat diseases caused by which helminths?

Answer 9

Strongyloides stercoralis and Onchocerca volvulus

Question 10

Diethylcarbamazine is used to treat diseases caused by which helminths?

Answer 10

Loa loa, Toxocara canis, and Wuchereria bancrofti

Question 11

Which helminths infect humans via the direct penetration of the skin?

Answer 11

Schistosoma, Ancylostoma duodenale(hookworm), and Strongyloides stercoralis

Question 12

Granulomas are formed in infections that are caused by which helminths?

Answer 12

Schistosoma and Toxocara canis

Question 13

Chronic infection with Schistosoma haematobium can lead to what cancer?

Answer 13

Squamous cell carcinoma of the bladder

Question 14

Which nematodes are transmitted by ingesting contaminated food?

Answer 14

Enterobius, Ascaris, and Trichinella (remember: you’ll get sick if you EAT these!)

Question 15

Which nematodes are transmitted cutaneously?

Answer 15

Strongyloides, Ancylostoma, and Necator
(remember: these get into your feet
from SANd)

Question 16

Name the parasite that causes brain cysts and seizures.

Answer 16

Taenia solium

Question 17

Name the helminth that causes liver cysts.

Answer 17

Echinococcus granulosus

Question 18

Name the helminth that causes vitamin B12 deficiency.

Answer 18

Diphyllobothrium latum

Question 19

Name the helminth that causes biliary tract disease and is associated with
cholangiosarcoma.

Answer 19

Clonorchis sinensis

Question 20

Name the helminth that causes hemoptysis.

Answer 20

Paragonimus westermani

Question 21

Name the helminth that causes portal hypertension.

Answer 21

Schistosoma mansoni

Question 22

Name the helminth that causes hematuria and bladder cancer.

Answer 22

Schistosoma haematobium

Question 23

Name the helminth that cause microcytic anemia.

Answer 23

Ancylostoma and Necator

Question 24

Name the helminth that causes perianal pruritus.

Answer 24

Enterobius