Intestinal Flukes

Question 1

first intermediate host of Fasciolopsis buski

Answer 1

Segmentina hemisphaerula

Question 2

F.buski may enter the human body by Ingestion of encysted metacercariae on which kinds of vegetation?

Answer 2

aquatic plants

Question 3

once inside, Viable metacercaria excysts in what spec part of the body?

Answer 3

duodenum

Question 4

Which is false?
a. Adult is the longest parasitic trematode of man
b. does not have a cephalic cone
c. intestinal ceca are branched and reach up to the
posterior end

Answer 4

c

unbranched ang intestinal ceca

Question 5

diagnostic stage of F.buski

Answer 5

parasite eggs in stool

Question 6

Where does the F.buski egg embryonate?
A. water
B. intestines
C. feces
D. any of the above

Answer 6

A

Question 7

Inside the snail, the miracidia turns into all except
A. sporocyst
B. rediae
C. cercariae
D. metacercariae

Answer 7

D

Question 8

true or false
Cercariae attach themselves and encyst as
metacercariae on the surfaces of seed pods, bulbs, stems, or roots of various aquatic plants

Answer 8

true

Question 9

the \_\_ is the main animal reservoir of infection for man
A. cow
B. pig
C. rat
D. horse

Answer 9

B

Question 10

A. Inflammation and ulceration at site of attachment
B. gland abscesses
C. toxic and allergic symptoms:
D. excessive bleeding

Which is not a clinical manifestation of F.buski?

Answer 10

D

Question 11

Which is false?
A. F.buski is not endemic in Philippines due to lack of second intermediate hosts
B. Metacercariae are resistant to drying
C. F.buski may be ingested when the hull or skin of the fruit is peeled off in between teeth
D. F.buski is attached to mucosa thru suckers

Answer 11

B

Question 12

False about Echinostoma ilocanum
A.infects the intestine and bile duct of their hosts
B.hermaphroditic
C.tegument bound by tubercles
D.affects only humans

Answer 12

D

zoonotic siya

Question 13

False about Echinostoma ilocanum
A. adult echinostoma have 2 suckers: anterior oral and
ventral
B. circle of spines around the ventral sucker
C. causing irritation and bleeding of the intestinal mucosa

Answer 13

B

oral sucker dapat

Question 14

Which is false?
A. unembryonated eggs pass out at feces
B. embryonation happens in the water
C. Snail ang intermediate host
D. Larva always becomes metacercariae at first intermediate host

Answer 14

D

Question 15

Which is false?
A. The definitive host becomes infected after eating the second intermediate host
B. Metacercariae excyst in jejunum
C. Adults reside in the small intestines
D. All are false

Answer 15

B

duodenum dapat

Question 16

Diagnostic stage of Echinostoma ilocanum

Answer 16

Detection of eggs in stool

Question 17

False about Heterophyid Flukes
A. With host specificity
B. Adult is elongated, oval or pyriform
C. Tegument has fine scale-like spines
D. Hermaphroditic

Answer 17

A

Question 18

One of the 2nd IM hosts of heterophyid flukes is Oreochromis niloticus, or more commonly known as \_\_\_
A.bangus
B.dilis
C.tilapia
D.lapu-lapu

Answer 18

C

Question 19

T or F

Operculum fits into egg shell smoothly & does not hce an abopercular protuberance

Answer 19

T

Question 20

T or F
Unembryonate Heterophyid eggs are passed in stool, and they only become embryonated when they enter the first intermediate host.

Answer 20

F

Embryonated eggs with fully developed miracidia are passed in feces

Question 21

When snail hosts ingest Heterophyid eggs, what happens to the miracidia?

Answer 21

They emerge from eggs and penetrate the small intestine.

Question 22

Which does not happen in the snail intermediate host, when it comes to Heterophyid fluke life cycle?
A. Turn into sporocyst
B. Turn into redia
C. Turn into cercaria
D. Turn into metacercaria

Answer 22

D

Question 23

Where do Heterophyid cercaria encyst as metacercaria?

Answer 23

Scales, muscles, fins, tails or gills of fish species

Question 24

Infective stage of heterophyid flukes

Answer 24

Ingestion of metacercaria encysted in fish

Question 25

Metacercaria excysts when it reaches the ___

Answer 25

Duodenum

Question 26

Diagnostic stage of heterophyid flukes

Answer 26

Heterophyid eggs in stool

Question 27

Top 1 endemic province of heterophyid flukes

Answer 27

Davao del Sur

Question 28

Top 2 endemic province of heterophyid flukes

Answer 28

Compostela Valley