Week Three: Phylum Platyhelminthes (Chapter Five) Flashcards Preview

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Flashcards in Week Three: Phylum Platyhelminthes (Chapter Five) Deck (31):
1

What class is eucestoda, in?

Cestoda

2

What class is the platyhelminthe, fluke, in?

Trematoda

3

What is cotyloda?

Pseudotapeworm

4

What is a eucestoda?

True tapeworm

5

What do flukes look like?

Flat, leaf shaped

6

What do tapeworms look like?

Long, ribbon like, segmented

7

What are proglottids?

Section of a tapeworm that contains eggs (end pieces of parasite)

8

What is the scolex?

Head of a cestode

9

What is a cestodes organ of attachment and how are nutrients absorbed?

Lining of small intestine; nutrients are absorbed through the tegument

10

What are the two types of attachment cestodes use to attach to the mucosa of the small intestine?

Acetabula (suckers, unarmed tapeworm)
Rostellum (backward facing hooks, armed tapeworms)

11

What does hermaphroditic mean?

Contains complete sets of both male and female reproductive organs

12

What does hexacanth mean?

Six hooks

13

What is the dipylidium egg?

Egg packet containing multiple hexacanths within one egg

14

What is a taenia?

Egg has one hexacanth within the egg

15

Explain the life cycle of a cestode

-Gravid proglottids pass to outside environment and rupture
-Egg must be ingested by intermediate host
-(Within host-egg develops into metacestode)
-Definitive host becomes infected by ingesting intermediate host

16

How does the definitive host become infected by a cestode? (Dipylidium)

By ingesting the intermediate host
(ex. dog eating a flew)

17

What is an example of an intermediate host of a cestode (taenia)?

Arthropods
-Fleas
-Mites

18

How does the definitive host become infected by a cestode? (taenia)

By ingesting the intermediate host
(ex. dog eats a bird that in infected with parasite)

19

What is the cysticercus stage?

Bladder worm stage

20

Explain the appearance of cotyloda

Long, segmented, flattened, almost ribbon like
Contains scolex and bothria

21

What are bothria?

Two slitlike, hold fast organelles on anterior end of pseudotapeworm

22

Where is the attachment site of cotyloda and how do they absorb nutrients?

Lining of small intestine; absorb nutrients through the body wall

23

Do cotyloda have one or two sexes?

Hermaphroditic- two (both male and female)

24

Dipylidium caninum:
Host, location of adult, intermediate host, transmission route, and common name

Host: Dogs and cats
Location of adult: Small intestine
Intermediate host: Adult fleas
Transmission route: Ingestion of infective adult flea
Common name: Tapeworm

25

What is the treatment of Dipylidium caninum?

Praziquantel
Epsiprantel
Flea control

26

Taenia pisiformis, T. hydatigena, T. ovis:
Host, location of adult, transmission route, common name

Host: Dogs
Location of adult: Small intestine
Transmission route: Ingestion of infective intermediate host
Common name: Mutton tapeworm of dogs

27

Intermediate hosts for:
Taenia pisiformis
Taenia hydatigena
Taenia ovis

T. pisiformis: Rabbits and hares
T. hydatigena: Ruminants
T. ovis: Sheep

28

What is the treatment for Taenia spp

Praziquantel
Epsiprantel

29

Taenia taeniaeformis:
Host, location of adult, intermediate host, transmission route, common name

Host: Cats
Location of adult: Small intestine
Intermediate host:Rats and mice
Transmission route: Ingestion of infective rats or mice
Common name: Feline taeniid, feline tapeworm

30

Treatment for Taenia taeniaeformis

Praziquantel

31

Spirometra spp:
Host, location of adult, intermediate host (first and second), transmission route, common name

Host: Dogs and cats
Location of adult: Small intestine
First intermediate host: Aquatic crustacean
Second intermediate host: Fish or frogs
Transmission route: Ingestion of infective fish or frog
Common name: Zipper tapeworm, sparganosis tapeworm