Brainscape's Knowledge GenomeTM

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


See full index

Parasitology > Cestoda > Flashcards

Cestoda Flashcards

1
Q

What is the common name for Dipylidium Caninum?

A

Common tapeworm

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

What are the hosts of Dipylidium Caninum?

A

Final host dogs, cats, and humans. Intermediate hosts are fleas and louse

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

What are the characteristic features of Dipylidium Caninum?

A

Fresh segment looks like cucumber seed, dried segment like a grain of rice. Up to 50cm in length. Egg packets contain 10-20 eggs

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

What can you distinguish about this image?

A

Dipylidium Caninum proglottid with bilateral genital pores

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

What is this image showing you?

A

Dipylidium Caninum scolex and neck

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Does this look like bacon to you?

A

No! That’s because it’s a small intestine infested with Dipylidium Caninum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is this image showing you?

A

Dipylidium Caninum egg packets containing eggs

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

What parasitic species does this larvae stage belong to? And why is it important in the tapeworm life cyle?

A

Ctenocephalides spp. aka dog flea larvae. Egg is ingested by flea larvae.

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

Describe the life cycle of Dipylidium Caninum?

A

Posterior segments of adult worms are passed in the feces -> Segments and egg packets are in the feces or on the fur -> eggs are ingested by flea larvae or occasionally the louse -> larval flea develops into adult and tapeworm eggs hatch into larval stages (synchronous development of tapeworm and flea)-> final host is infected by ingestion of infected flea or louse containing infective tapeworm larvae (cysticercoids). PPP 21 days

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Where are the sites of infection for Dipylidium Caninum?

A

Adult worms in small intestine. Larval stage (cysticercoid) in flea and louse

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

What are the pathogenesis and lesions for Dipylidium Caninum?

A

Adults are non-pathogenic, though the segments cause discomfort

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

What are the clinical signs for Dipylidium Caninum infestation?

A

Excessive grooming around the perineum.

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

How is Dipylidium Caninum diagnosed?

A

Demonstrate segments in bedding, adhesive tape or scotch tape method

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

What is the treatment or prevention for Dipylidium Caninum?

A

Treat final host with cestocide, treat for intermediate hosts with insecticide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Cats become infected with Dipylidium Caninum by ingesting fleas containing cysticercoids. The fleas become infected with this cestode by ingesting:

a. cysticerci in circulating blood
b. tapeworm eggs in larval fleas
c. tapeworm eggs in young adult fleas
d. mesocercariae in circulating blood
e. infected orbatid mites

A

b. tapeworm eggs in larval fleas

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

What is the common name for Echinococcus Granulosus?

A

Hydatid Tapeworm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What are the hosts for Echinococcus Granulosus?

A

Final hosts are dogs and other canids. Intermediate hosts are herbivores and humans.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What are the characteristic features of Echinococcus Granulosus?

A

Adult tapeworms are small, 6 mm. Larval stages (hydatid cysts) in liver, lungs, and other organs. Taeniid eggs 25-40 micrometers and may be recovered in feces.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What can you see in this image?

A

Echinococcus Granulosus egg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What parasitic species is shown in this image?

A

Echinococcus Granulosus Adult - notice the scolex with 3 proglottids

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Is this a larval stage of Echinococcus Granulosus?

A

No, this is the adult stage because it has a mature proglottid containing thick shelled eggs in the posterior

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What does the larvae of Echinococcus Granulosus develop into when ingested by intermediate host?

A

Hydatid cyst with endogenous budding.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What do you see in this image?

A

Hydatid cysts in the liver from Echinococcus spp.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Holy guacamole what is going on in this image?

A

Lungs infected by Echinococcus Granulosus Hydatid cysts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

What can you distinguish about this histological slide?

A

Hydatid cysts containing scolices

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

Describe the life cycle of Echinococcus Granulosus

A

Adult worms shed 1 gravid segment with eggs in the feces -> these develop to oncospheres -> eggs are ingested by intermediate host -> eggs hatch and larvae penetrate intestine and migrate to the liver and lungs -> hydatid cysts develop and is infective stage to the final host -> final host ingests infected intermediate host -> then the scolices evaginate and attach to mucousa of small intestine and mature. PPP 45-60 days

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

Where are the sites of infection for Echinococcus Granulosus?

A

Adults in small intestine. Larval stage (hydatid cyst) in liver and lungs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

What are the pathogenesis and lesions of Echinococcus Granulosus?

A

Adults nonpathogenic in dogs but hydatid cysts are pathogenic in humans

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

What are the clinical signs of Echinococcus Granulosus infection?

A

Clinical disease is rare in canids. In humans, hydatid can cause disease

30
Q

How is Echinococcus Granulosus diagnosed?

A

Eggs are Taenia and Echinococcus are indistinguishable

31
Q

What are the treatment and prevention for Echinococcus Granulosus?

A

Regular anthemintic treatment of dogs, do not feed uncooked offal, sylvatic cycle (wildlife) becomes a challenge

32
Q

What is the common name for Echinococcus Multilocularis?

A

Alveolar hydatid tapeworm

33
Q

What are the hosts for Echinoccous Multilocularis?

A

Final hosts are wild canids and domestic dogs. Intermediate hosts are cattle, horses, swine, rodents and humans

34
Q

What are the characteristic features of Echinococcus Mulitlocularis?

A

Adults are 6 mm in length. Alveolar hydatid cysts in liver and other organs. Taeniid eggs may be in feces

35
Q

What is different about the alveolar hydatid cyst in E. Multilocularis as opposed to the hydatid cyst in E. Granulosus?

A

Alveolar hydatid cyst is not confined by a capsule and performs exogenous budding as opposed to endogenous budding in E. Granulosus

36
Q

The life cycle of E. Granulosus and E. Multilocularis are quite similar but what makes them different?

A

Alveolar hydatid cyst in E. Multilocularis is more invasive because of the exogenous budding and is capable in systemic matastases.

37
Q

What can you distinguish about this image?

A

Egg of Taenia spp. containing a hexacanth embryo and surrounded by a embryophore

38
Q

What is this image showing?

A

Alveolar hydatid cyst containing larval stage

39
Q

Where are the sites of infection for Echinococcus Mulitlocularis?

A

Adults in small intestine. Larval stages develop alveolar hydatids in liver with metastases to other organs

40
Q

What are the pathogenesis and lesions for Echinococcus Multilocularis?

A

Final host usually non-pathogenic. Intermediate host develops an alveolar cyst. Alveolar hydatid is slow growing and eventually fatal.

41
Q

What are the clinical signs for E. Multilocularis?

A

Rare in final host. Invasive growth of hydatid cyst in humans can be fatal.

42
Q

What order of trematodes does this parasite belong to and how can you tell?

A

Cyclophyllidea becaue it has a scolex with suckers

43
Q

What order of trematodes does this parasite belong to and how can you tell?

A

Pseudophyllidea because it has a scolex with bothria which is a slot-like groove that allows it to stay in place

44
Q

What parasitic species do these eggs belong to?

A

Taenia spp.

45
Q

What species cestodes possess a cysticercus larval stage?

A

Taenia Crassiceps and Taenia Pisiformis

46
Q

What species of cestodes possess a Strobilocercus larval stage?

A

Teania taeniaeformis

47
Q

Oh my lanta what is this image showing?

A

Cysticerci of Taenia Pisiformis

48
Q

What are the hosts for Taenia Crassiceps?

A

Final hosts are foxes and dogs. Intermediate hosts are small rodents. Zoonotic

49
Q

What are the characteristic features of Taenia Crassiceps?

A

Adult with scolex and suckers, 2 m long. Unilateral genital pores. Cysticerci in intermediate host. Eggs taeniid type, brown color.

50
Q

What species and structure of cestode is this image showing?

A

Taenia Pisiformis scolex

51
Q

What is unique about the Taeniae Pisiformis proglottid?

A

Unilateral proglottid as opposed to bilateral in Dipyllidium Caninum

52
Q

Where are the sites of infection for Taenia Crassiceps?

A

Adult tapeworm in small intestine. Larval stages (cysticerci) in adominal cavity of intermediate hosts

53
Q

What are the hosts of Taenia Pisiformis?

A

Final hosts are dogs, wolves, foxes. Intermediate hosts are rabbits. NON-ZOONOTIC

54
Q

Where are the sites of infection of Taenia Pisiformis?

A

Adult tapeworm in small intestine of final host. Larval stage (cysticercus) in liver and peritoneum of intermediate host.

55
Q

What are the hosts of Taenia Taeniaeformis?

A

Final hosts include cats. Intermediate hosts include mice and rats, rarely humans so it is zoonotic.

56
Q

What are the characteristic features of Taenia taeniaeformis?

A

Adults up to 60cm. Larval stage (strobilocercus) in liver of intermediate.

57
Q

What parasitic species causes Strobilocercus cyst in the liver of rodents?

A

Taenia Taeniaeformis

58
Q

Explain the life cycle of Taenia spp.

A

Gravid taeniid segments are shed from carnivore final host -> segments release eggs in environment and develop to oncospheres -> ocosphere is ingested by intermediate host and enters the wall of small intestine to migrate to organ of predilection -> then they develop to second stage larva (cysticercus) -> after final host ingests cysticercus, it is digested and develops in the small intestine to an adult tapeworm. PPP depending on species 6 weeks to 14 weeks

59
Q

Adult taeniid tapeworms are found in dogs, cats, and humans. The life cycle is characterized by the requirement of what kind of intermediate host?

A

Mammalian intermediate host

60
Q

Cats become infected with Taenia Taeniaeformis by ingesting infected:

a. fleas
b. fish
c. earthworms
d. rodents
e. snails

A

d. Rodents

61
Q

What is the common name for Diphyllobothrium Latum?

A

Broad fish tapeworm

62
Q

What are the hosts for the Broad fish tapeworm?

A

Final hosts: humans, fish eating mammals (dogs). Intermediate host: Copepod crustacean infected with proceroid and freshwater fish infected with plerocercoid. Paratenic hosts involved too

63
Q

What are the characteristic features of the Broad Fish tapeworm?

A

Adults 12 m long, scolex with bothria, square shaped segments

64
Q

What do you see in the image below?

A

Diphyllobothrium Latum eggs. Notice the operculum present too!

65
Q

How is Diphyllobothrium Latum diagnosed?

A

Fecal sedimentation although can be confused with Fasciola Hepatica

66
Q

What is the common name for Spirometra spp.?

A

Zipperworm also known as Sparganosis in humans

67
Q

What are the hosts of Spirometra spp.?

A

Final hosts: bobcats, dogs, cats, lynxes, raccoons. Intermediate hosts: 1) crustacean and 2) water snakes, frogs, rodent, birds but not fish

68
Q

What are characteristic features of Spirometra spp.?

A

Adults 2 m long, scolex with bothria, reproductive organs at centers of segments where eggs are discharged

69
Q

What species of cestode is in the image below? What is the arrow pointing to?

A

Spirometra spp. Reproductive organs concentrated at center of segments

70
Q

How is Spirometra spp. diagnosed?

A

Fecal sedimentation, may resemble that of Fasciola Hepatica.

71
Q

What are some diagnostic methods for cestodes?

A
  1. Adhesive tape swab
  2. Centrifugation/flotation
  3. Fecal flotation
  4. Necropsy (gold standard)

Parasitology (11 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions