Deck 56: Liver and Lung Trematodes

Question 1

MATCHING
Match the fluke classification with the corresponding organism.
a.Opisthorchis viverrini
b.Fasciola spp.
c.Clonorchis (Opisthorchis) sinensis
d.Paragonimus westermani
Chinese liver fluke

Answer 1

C

Question 2

MATCHING
Match the fluke classification with the corresponding organism.
a.Opisthorchis viverrini
b.Fasciola spp.
c.Clonorchis (Opisthorchis) sinensis
d.Paragonimus westermani
Southeast Asian liver fluke

Answer 2

A

Question 3

The eggs of Paragonimus mexicanus measure approximately 80 microns by 40 microns, are unembryonated and operculated, and have thick shells that are brownish yellow.An individual with this infection has most likely traveled to which endemic area?

A) Japan
B) Africa
C) New Guinea
D) South America

Answer 3

D
Paragonimus is found primarily in the Far East (China, Japan, Korea, Manchuria, Papua New Guinea, and Southeast Asia), and certain species such as P.mexicanus are found in areas of Mexico and South America.The eggs of P.westermani measure 80 to 120 microns by 45 to 60 microns, and those of P.mexicanus are approximately 80 microns by 40 microns.The eggs are unembryonated when they leave the body, operculated with opercular shoulders, thick shelled, and brownish yellow.

Question 4

Charcot-Leyden crystals are often observed in specimens infected with which one of the following trematodes?

A) Clonorchis (Opisthorchis) sinensis
B) Opisthorchis viverrini
C) Fasciola hepatica
D) Paragonimus westermani

Question 5

MATCHING
Match the fluke classification with the corresponding organism.
a.Opisthorchis viverrini
b.Fasciola spp.
c.Clonorchis (Opisthorchis) sinensis
d.Paragonimus westermani
Lung fluke

Question 6

Which second intermediate host ingests the cercariae of Clonorchis and Opisthorchis?

A) Snail
B) Crustacean
C) Copepod
D) Freshwater fish

Question 7

MATCHING
Match the fluke classification with the corresponding organism.
a.Opisthorchis viverrini
b.Fasciola spp.
c.Clonorchis (Opisthorchis) sinensis
d.Paragonimus westermani
Sheep liver fluke

Question 8

The adult worm of Fasciola measures 2 to 5 cm by 0.8 to 1.3 cm with a cephalic cone at the anterior end that contains the oral sucker.The drug of choice to treat Fasciola infections is:

A) praziquantel.
B) bithionol.
C) albendazole.
D) benzimidazole.