trematodes

Question 1

All trematodes have operculated ova EXCEPT:

Answer 1

Schistosoma species

Question 2

The trematode that is identified by the presence of branched intestine:

Answer 2

Fasciola species

Question 3

All of the following statements CORRECTLY describe the testes of trematodes EXCEPT:

a. all of the statements are true about the testes of trematodes
b. found on the posterior portion of the body
c. comes in pair
d. can be round, dendritic or lobulated

Answer 3

a. all of the statements are true about the testes of trematodes

Question 4

The parasite with furocercous type of cercaria is acquired by humans by:

Answer 4

skin penetration

Question 5

T or F: Schistosoma species have reunited ceca at the posterior part of their bodies

Answer 5

True sisz

Question 6

T or F: The ventral suckers of Paragonimus adult is found close in proximity to their oral suckers.

Answer 6

false girl

Question 7

T or F: Clonorchis is identified by the presence of gonotyl or genital sucker

Answer 7

ofc false heterophyes dapat

Question 8

where can one find the adult stages of hepatic flukes?

Answer 8

bile ducts

Question 9

in the case of Clonorchis, the infective stage to the snail host is the :

Answer 9

embryonated ovum

Question 10

Which of the following parasitic stages of Trematodes is provided with oral sucker to get rid of competition for the snail tissue?

Answer 10

redia

Question 11

Infection with which fluke can have brain involvement?

Answer 11

Schistosoma and Paragonimus

Question 12

Antemelania asperata is the:

Answer 12

first intermediate host of Paragonimus

Question 13

T or F: A patient was brought to your clinic because of hemoptysis (coughing out of blood). To diagnose this as a case of Paragonimiasis, the sputum should be subjected to acid fast staining.

Answer 13

false mamsh

Question 14

T or F: the cercaria of the oriental lung fluke is a microcercous type.

Answer 14

True

Question 15

what is the first line of treatment for Paragonimiasis? This drug can also be used to treat cases of Cestode infection.

Answer 15

praziquantel

hack: basta cesstodes and trematodes matic praziquantel

Question 16

Which of the following structures contribute to the formation of the shell of the trematode eggs?

oviduct 
uterus 
seminal receptacle 
vitellaria 
ootype

Answer 16

vitellaria

Question 17

type of cercaria of Opisthorchis spp

Answer 17

Pleurolophocercous

Question 18

second intermediate host for Gastrodiscoides hominis

Answer 18

• Trapa bicornis (water caltrops)
• Eleocharis tuberosa (water chestnuts)
• Ipomea obscura (kanggkong)
• Nymphaea lotus (lotus)
• Nasturtium officinale (cress)

Question 19

Metagonimus yokogawai

common name:
habitat:
1st intermediate host:
2nd intermediate host:
infective stage:
pathology:

Answer 19

common name: Smallest human fluke
habitat: small intestine
1st intermediate host: snail
2nd intermediate host: salmonid fish
infective stage: metacercaria
pathology: metagonimiasis

Question 20

second intermediate host of fasciola spp

Answer 20

Nasturtium officinale (watercress)
Ipomea obscura (kangkong)

Question 21

second intermediate host of fasciolopsis buski

Answer 21

Trapa bicornis (water caltrops)
Eleocharis tuberosa (water chestnuts)
Ipomea obscura (obscure morning glory) 
Nymphaea lotus (lotus)

Question 22

second intermediate host of E. ilocanum

Answer 22

Pila luzonica

Vivipara angularis

Question 23

Artyfechinostomum malayanum:

first intermediate host:
second intermediate host:

Answer 23

first intermediate host:
Indoplanorbis exustus
Gyraulus convexiusculus

second intermediate host:
Pila scutata
Lymnaea cumingiana

Question 24

Which of the following intestinal flukes can have CNS involvement in the pathogenesis?

Heterophyes
Echinostoma
Clonorchis
Fasciolopsis

Answer 24

Heterophyes

Question 25

Which of the following trematodes is known to cause cholangiocarcinoma? Clonorchis Fasciolopsis Echinostoma Fasciola

Answer 25

Clonorchis

Question 26

Halzoun is acquired through _________

Answer 26

ingestion of raw sheep liver fluke

Question 27

What is the distinguishing structure of Echinostoma?

Answer 27

circumoral disc

Question 28

To differentiate Clonorchis from Opisthorchis adults, one must check the ________

Answer 28

testes ``` clonorchis = branched opisthorchis = lobular ```

Question 29

what is the distinguishing feature of Fasciola adult worms?

Answer 29

cephalic cone

Question 30

T or F: After ingestion, the metacercaria of Clonorchis excyst out of the fish meat and penetrates the intestinal wall of the human host to migrate towards the liver

Answer 30

False

Question 31

T or F: The acute phase of fascioliasis is caused by the migration of the metacercaria from the intestinal lumen towards the Glissons capsule then into the liver parenchyma.

Answer 31

True

Question 32

Eating raw snail will predispose a person to develop an infection with:

Answer 32

Garrison's fluke (E. ilocanum)

Question 33

How will you differentiate the ova of Clonorchis and Heterophyes?

Answer 33

check for the presence of posterior knob