Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Y3 Parasitology > Tapeworms of ruminants > Flashcards

Tapeworms of ruminants Flashcards

1
Q

Which groups of worms do tapeworms belong to?

A

Platyhelminths - cestodes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are some of the general tapeworm characteristics?

A
  • Adult worms are segmented
  • Indirect life cycles – more than one host
  • Flatworms
  • Adult parasite in definitive host
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the name of the tapeworm when its in the intermediate host?

A

Metacestode - pathogenic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the name of the tapeworm body wall?

A

Tegument

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Describe the head of a tapeworm

A

Scolex

  • Can contain suckers or barbs
  • This is the end of the tapeworm that attaches to the gut
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

How do the segments of the tapeworm change as you move away from the head?

A
  • The newly produced segments called proglottids are behind the head, they get bigger and more mature as you go down the worm
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What does every mature proglottid contain?

A

Female and male sex organs

Vitelline glands to produce the egg shell when they are fertilised

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

How is nutrition taken into the tapeworms body?

A

Through the tegument

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Describe the general life cycle of a tapeworm

A
  • Adults in small intestine
  • Proglottids break off
  • Eggs/proglottids shed in faeces
  • Eggs immediately infective
  • Eggs eaten by intermediate host
  • Metacestode develops in intermediate host
  • Metacestode eaten by definitive host
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Which type of metacestode goes on to become the head of the tapeworm?

A

Cysticercus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Lots of different copies of the cysticercus which can all give rise to a tapeworm are called?

A

Coenurus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Development of the Coenurus leads to which type of metacestode?

A

Hydatid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

When sheep are the intermediate host, what is the definitive host?

A

Dogs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Which 4 metacestodes are found in dogs?

A
  • Taenia ovis
  • Taenia hyatigenia
  • Taenia multiceps
  • Echinococcus granulosus
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Which metacestode causes sheep measles?

A

Taenia ovis - cysticercus in muscles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Which metacestode migrates through the liver in sheep?

A

Taenia hyatigenia

17
Q

What is the effect of Taenia multiceps?

A
  • affects the brain of a sheep

- space occupying lesion

18
Q

Hydatid cysts in the liver and lungs of sheep are caused by which metacestode?

A

Echinococcus granulosus

19
Q

What can you use to treat adult dogs for tapeworm, what is the dosing interval?

A

Praziquantel - every 6 weeks

20
Q

When cattle and pigs are the intermediate host, what species is the definitive host?

A

Humans

21
Q

Name the beef tapeworm metacestode

A

Taenia saginata

22
Q

Where is the metacestode of cattle tapeworm found?

A

In muscles

23
Q

Name the pork tapeworm metacestode

A

Taenia solium

24
Q

Human cysticercosis has what clinical signs/side effects?

A

Epilepsy, headaches, sub-cutaneous lumps, neuro and ocular cysticercosis

25
Q

Name the long adult tapeworm found in sheep and cattle

A

Monezia spp

26
Q

Describe the life cycle of Monezia spp

A
  • Metacestode stage (cysticercoid) develops in oribatid mite intermediate host
  • The whole mite gets ingested when the sheep and cattle graze
  • Lives in the SI
27
Q

You find a bunch of fluid filled cysts in the peritoneum associated with the liver of a sheep at the abattoir, what are they likely to be?

A

Taenia hydatigena

28
Q 
During meat inspection, you find a 1cm diameter cyst in 
(a) leg muscles of a sheep
(b) the masseter muscles of a cow
(c) lungs of a lamb. 
What are they most likely to be?
A

(a) Taenia ovis
(b) Taenia saginata
(c) Echinococcus granulosus

29
Q

How are sheep infected with T. hydatigena and T. ovis?

A

Through ingesting eggs shed in dog faeces (dogs are the definitive host, harbour the adult tapeworm, metacestodes found in sheep).

30
Q

An egg of 60um and another egg of 40um are found, which species do each most likely belong to?

A 
60 = Monezia spp, adult tapeworms in the gut of sheep 
40 = Taenia spp. or Echinococcus eggs found in faeces of dogs
31
Q

How would you differentiate between L1 larvae of Muellerius capillaris and Dictyocaulus filaria in faeces of a sheep?

A

Df L1 has a cuticular knob on the anterior end. Mc has a spike on the tail.

Y3 Parasitology (13 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions