Intestinal Flukes Flashcards
first intermediate host of Fasciolopsis buski
Segmentina hemisphaerula
F.buski may enter the human body by Ingestion of encysted metacercariae on which kinds of vegetation?
aquatic plants
once inside, Viable metacercaria excysts in what spec part of the body?
duodenum
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
c
unbranched ang intestinal ceca
diagnostic stage of F.buski
parasite eggs in stool
Where does the F.buski egg embryonate? A. water B. intestines C. feces D. any of the above
A
Inside the snail, the miracidia turns into all except A. sporocyst B. rediae C. cercariae D. metacercariae
D
true or false
Cercariae attach themselves and encyst as
metacercariae on the surfaces of seed pods, bulbs, stems, or roots of various aquatic plants
true
the \_\_ is the main animal reservoir of infection for man A. cow B. pig C. rat D. horse
B
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?
D
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
B
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
D
zoonotic siya
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
B
oral sucker dapat
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
D
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
B
duodenum dapat
Diagnostic stage of Echinostoma ilocanum
Detection of eggs in stool
False about Heterophyid Flukes A. With host specificity B. Adult is elongated, oval or pyriform C. Tegument has fine scale-like spines D. Hermaphroditic
A
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
C
T or F
Operculum fits into egg shell smoothly & does not hce an abopercular protuberance
T
T or F
Unembryonate Heterophyid eggs are passed in stool, and they only become embryonated when they enter the first intermediate host.
F
Embryonated eggs with fully developed miracidia are passed in feces
When snail hosts ingest Heterophyid eggs, what happens to the miracidia?
They emerge from eggs and penetrate the small intestine.
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
D
Where do Heterophyid cercaria encyst as metacercaria?
Scales, muscles, fins, tails or gills of fish species
Infective stage of heterophyid flukes
Ingestion of metacercaria encysted in fish
Metacercaria excysts when it reaches the ___
Duodenum
Diagnostic stage of heterophyid flukes
Heterophyid eggs in stool
Top 1 endemic province of heterophyid flukes
Davao del Sur
Top 2 endemic province of heterophyid flukes
Compostela Valley
