Exam 2 Review -- Dipylidium caninum

Question 1

What egg does this depict? Describe the tegument of 4.

Answer 1

Paragonimus westermani; spiny

Question 2

If a person accidentally ingests adult flea with cystercoid, will he become infected?

Answer 2

Yes.

Question 3

Schistosomes have a ______ sporocyst, ____ metacercaria, and ____ is the definite host.

Answer 3

daughter; no; human

Question 4

Is *Dipylidium caninum* monozenous, dizenous, polyzenous, all or none of these? Explain.

Answer 4

Diozenous. It needs 2 intermediate hosts to complete the life cycle.

Question 5

What do a, f, and g depict?

Answer 5

rostellum; hooks; suckers

Question 6

What egg does this depict? What is 1?

Answer 6

Clonorchis sinesis; testes

Question 7

What trematode is this? What is 4?

Answer 7

Fasciola hepatica; tegument spiny

Question 8

What is the most dangerous trematode?

Answer 8

S. Japonicum

Question 9

What trematode laid this egg? What is the name of the enclosed red ring?

Answer 9

S. Japonicum; terminal bulb

Question 10

What egg does this depict? Describe the shape of 3?

Answer 10

Paragonimus westermani; coffee bean shape

Question 11

If a human accidentally ingests egg packets containing embryonated eggs, will he become infected?

Answer 11

No. The person gets infected only if he ingests adult flea with cysticercoid.

Question 12

Describe the egg of Fasciola hepatica.

Answer 12

operculated, open and close.

Question 13

What trematode is this? What is 2?

Answer 13

Fasciola hepatica; shoulders

Question 14

What is h?

Answer 14

genital openings

Question 15

What egg does this depict? What is 2?

Answer 15

Paragonimus westermani; suckers

Question 16

These egg capsules belong to what parasite? Where are they located?

Answer 16

Dipylidium caninum; uterus

Question 17

What egg does this depict? What is 2 and 3?

Answer 17

Clonorchis sinesis; seminal; uterus vesicle

Question 18

What trematode laid this egg? What is the name of the enclosed red ring?

Answer 18

S. Japonicum; terminal bulb

Question 19

Which cestode represents 2 + entrances + caninum?

Answer 19

Dipylidium caninum

Question 20

What do you notice unique about Dipylidium caninum?

Answer 20

It has 2 sets of organs, and 2 lateral genital pores.

Question 21

Which trematode has shoulders and a cone head: Fasciola hepatica or Fasciolopsis buski?

Answer 21

Fasciola hepatica

Question 22

What are the symptoms of Dipylidium caninum?

Answer 22

Anemia & diarrhea

Question 23

Which trematode has NO shoulders NOR a cone head: Fasciola hepatica or Fasciolopsis buski?

Answer 23

Fasciolopsis buski

Question 24

Where in the Dipylidium caninum life cycle does the infective stage begin?

Answer 24

Adult flea harbours the infective CYSTICERCOID.

Question 25

What are d and i?

Answer 25

gravid proglottid; eggs

Question 26

What is c?

Answer 26

mature proglottid

Question 27

What egg does this depict? Describe the tegument.

Answer 27

Faciolopsis busky; smooth

Question 28

What type of body is b?

Answer 28

immature proglottid

Question 29

What parasite do the images represent?

Answer 29

Dipylidium caninum

Question 30

What intermediate host does the Dipylidium caninum need to complete the life cycle?

Answer 30

Flea

Question 31

What type of body is this parasite (image A)? Name the genus and species.

Answer 31

Mature proglottid. Dipylidium caninum.

Question 32

What is the general life cycle of a **Schistosome**?

Answer 32

**Nonoperculated** eggs -\> Miracidia -\> Invade the Snail -\> Mother sporocyst -\> **Daughter sporocyst** -\> Cercaria (tail) -\> Invades host -\> Adults -\> Eggs

Question 33

What trematode is this? What is 3?

Answer 33

Fasciola hepatica; cone shaped

Question 34

What egg does this depict? What is 1?

Answer 34

Paragonimus westermani; wavy cecum

Question 35

Describe e. What parasite is this?

Answer 35

A packet with eggs. Dipylidium caninum.

Question 36

What is the life cycle of Dipylidium caninum?

Answer 36

Eggs in packet -\> Ingested in flea larva -\> Oncosphere is released -\> Cysticercoid (inside flea) -\> Flea turns into an adult -\> Adult flea with cysticercoid ingested by host -\> Eggs

Question 37

Describe the tegument of 4.

Answer 37

spiny

Question 38

Schistosomes have ___ sex, _____ eggs, and are _____ flukes.

Answer 38

separate; non-operculated; blood

Question 39

What trematode laid this egg? What part of the latter encloses the red ring?

Answer 39

S. haematobium; spine

Question 40

What trematode is this? What is 1?

Answer 40

Fasciola hepatica; uterus

Question 41

What is image B? What parasite does it belong to?

Answer 41

Dipylidium caninum eggs in packets.

Question 42

What is the general life cycle of **trematodes** other than Schistosomes?

Answer 42

**Operculated** eggs -\> Miracidia -\> Invade the Snail -\> Mother sporocyst -\> **Radiae** -\> Cercaria (tail) -\> **Metacercaria** -\> Invades host -\> Adults -\> Eggs

Question 43

What trematode laid this egg?

Answer 43

S. mansoni

Question 44

What is image C?

Answer 44

genital pores