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trematodes Flashcards

1
Q

All trematodes have operculated ova EXCEPT:

A

Schistosoma species

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2
Q

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

A

Fasciola species

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3
Q

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

A

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

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4
Q

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

A

skin penetration

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5
Q

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

A

True sisz

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6
Q

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

A

false girl

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7
Q

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

A

ofc false heterophyes dapat

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8
Q

where can one find the adult stages of hepatic flukes?

A

bile ducts

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9
Q

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

A

embryonated ovum

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10
Q

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

A

redia

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11
Q

Infection with which fluke can have brain involvement?

A

Schistosoma and Paragonimus

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12
Q

Antemelania asperata is the:

A

first intermediate host of Paragonimus

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13
Q

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.

A

false mamsh

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14
Q

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

A

True

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15
Q

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

A

praziquantel

hack: basta cesstodes and trematodes matic praziquantel

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16
Q

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

oviduct 
uterus 
seminal receptacle 
vitellaria 
ootype
A

vitellaria

17
Q

type of cercaria of Opisthorchis spp

A

Pleurolophocercous

18
Q

second intermediate host for Gastrodiscoides hominis

A
  • Trapa bicornis (water caltrops)
  • Eleocharis tuberosa (water chestnuts)
  • Ipomea obscura (kanggkong)
  • Nymphaea lotus (lotus)
  • Nasturtium officinale (cress)
19
Q

Metagonimus yokogawai

common name:
habitat:
1st intermediate host:
2nd intermediate host:
infective stage:
pathology:
A 
common name: Smallest human fluke
habitat: small intestine
1st intermediate host: snail
2nd intermediate host: salmonid fish
infective stage: metacercaria
pathology: metagonimiasis
20
Q

second intermediate host of fasciola spp

A 
Nasturtium officinale (watercress)
Ipomea obscura (kangkong)
21
Q

second intermediate host of fasciolopsis buski

A 
Trapa bicornis (water caltrops)
Eleocharis tuberosa (water chestnuts)
Ipomea obscura (obscure morning glory) 
Nymphaea lotus (lotus)
22
Q

second intermediate host of E. ilocanum

A

Pila luzonica

Vivipara angularis

23
Q

Artyfechinostomum malayanum:

first intermediate host:
second intermediate host:

A

first intermediate host:
Indoplanorbis exustus
Gyraulus convexiusculus

second intermediate host:
Pila scutata
Lymnaea cumingiana

24
Q

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

Heterophyes
Echinostoma
Clonorchis
Fasciolopsis

A

Heterophyes

25
Q

Which of the following trematodes is known to cause cholangiocarcinoma?

Clonorchis
Fasciolopsis
Echinostoma
Fasciola

A

Clonorchis

26
Q

Halzoun is acquired through _________

A

ingestion of raw sheep liver fluke

27
Q

What is the distinguishing structure of Echinostoma?

A

circumoral disc

28
Q

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

A

testes

clonorchis = branched
opisthorchis = lobular
29
Q

what is the distinguishing feature of Fasciola adult worms?

A

cephalic cone

30
Q

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

A

False

31
Q

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.

A

True

32
Q

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

A

Garrison’s fluke (E. ilocanum)

33
Q

How will you differentiate the ova of Clonorchis and Heterophyes?

A

check for the presence of posterior knob

Para (8 decks)

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