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DMP 718 - Veterinary Parasitology > Cestodes and Metacestodes > Flashcards

Cestodes and Metacestodes Flashcards

1
Q

Dipylidiasis

A

Dipylidium caninum

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2
Q

Dipylidium caninum - Common name

A

Double-pored tapeworm

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3
Q

Dipylidium caninum - Taxonomy

A

Class: Cestoidea
Order: Cyclophyllidea

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4
Q

Dipylidium caninum - Hosts and distribution

A

Dog, cat, fox

Cosmopolitan

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5
Q

Dipylidium caninum - Morphology

A

2 genital pores
Up to 50 cm/19” long
Eggs in egg packets

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6
Q

Dipylidium caninum - Life cycle

A

Egg packets released from host rectum
Eaten by flea larva and becomes a cysticercoid
Host eats infected flea
Adults develop in small intestine

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7
Q

Dipylidium caninum - PPP

A

2-3 weeks

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8
Q

Dipylidium caninum - Pathology

A

Blockage in heavy infections

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9
Q

Dipylidium caninum - Clinical signs

A

Minimal
Emaciation in severe infections
Abdominal discomfort

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10
Q

Dipylidium caninum - Diagnosis

A

Gravid segments around anus

Egg packets in fecal exam

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11
Q

Dipylidium caninum - Treatment

A

Praziquantel
Epsiprantel
MUST TREAT FOR FLEAS TOO

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12
Q

Dipylidium caninum - Public health

A

Rarely children will become infected

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13
Q

Taeniasis

A

Taenia pisiformis

Taenia taeniaeformis

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14
Q

Taenia sp. - Common name

A

Taenias

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15
Q

Taenia sp. - Hosts and distribution

A

Dogs and cats

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16
Q

Taenia sp. - Taxonomy

A

Class: Cestoidea
Family: Taeniidae

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17
Q

Taenia sp. - Morphology

A

Big
Scole with arm rostellum
Single marginal genital pores

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18
Q

Taenia pisiformis - Metacestode, IH, and Location

A

Metacestode: Cysticercus
IH: Rabbit
Location: Peritoneal cavity

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19
Q

Taenia taeniaeformis - Metacestode, IH, and Location

A

Metacestode: Strobilocercus
IH: Rodents
Location: Liver

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20
Q

Taenia sp. - Life cycle

A 
Gravid segments in feces
Eggs ingested by IH
Hexacanth embryo develops into metacestode
Host eats IH with metacestode
Tapes mature in small intestine
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21
Q

Taenia sp. - PPP

A

2-3 months

22
Q

Taenia sp. - Pathology

A

Usually none unless heavy infection

Metacestode in IH can cause physiological or neurological damage

23
Q

Taenia sp. - Clinical signs

A

No definite signs

24
Q

Taenia sp. - Diagnosis

A

Segments in feces

Eggs in feces

25
Q

Taenia sp. - Treatment

A

Fenbendazole
Praziquantel
Epsiprantel

26
Q

Taenia sp. - Control

A
  1. Regular anthelmintic treatment of dogs and cats

2. Don’t permit pets to eat rabbits or rodents

27
Q

Taenia sp. - Public health

A

Only Echinococcus granulosus (alveolar hydatid disease and cystic hydatid disease) and E. multiocularis
Kills people

28
Q

Echinococcus sp. - Morphology

A

Typical taenia type egg

Adults 1-6 mm

29
Q

Cestodiasis

A

Mesocestoides spp.

30
Q

Mesocestoides spp. - Host and distribution

A

Canids, cats, raccoons, foxes

Western US

31
Q

Mesocestoides spp. - Morphology

A

Scolex with 4 suckers but no hooks or rostellum

1 m in length

32
Q

Mesocestoides spp. - Life cycle

A

1st IH: cysticercoid in oribatid mite or dung beetle

2nd IH: tetrathyridia in amphibians, reptiles, birds, and mammals

33
Q

Mesocestoides spp. - Pathology

A

Intestinal infection non-pathogenic

Tetrathyridial infection in dogs and cats can cause severe peritonitis

34
Q

Mesocestoides spp. - Clinical signs

A

Adults: Usually none

Peritoneal mesocestodiasis: Ascites, anorexia, weight loss, emesis, diarrhea, depression, fever

35
Q

Mesocestoides spp. - Diagnosis

A

Adults: Motile segments in stool or eggs in fecal

PLC - Clinical signs and identification of tetrathyridia in abdominal effusion

36
Q

Mesocestoides spp. - Treatment

A

Adult tapes: Prazi

PLC: Fenbendazole & peritoneal lavage

37
Q

Mesocestoides spp. - Public health

A

Ingetions of tetrathyridia in undercooked meat

38
Q

Pseudophyllidea

A

Diphyllobothrium latum

Spirometra mansonoidea

39
Q

Diphyllobothrium latum - Common name

A

Broad fish tapeworm

40
Q

Spirometra mansonoideas - Common name

A

Zipper tapeworm

41
Q

Pseudophyllidea - Taxonomy

A

Class: Cestoidea
Order: Pseudophyllidea
Family: Diphyllobothridae

42
Q

Pseudophyllidea - Morphology

A

Large worms
Scolex elongated with 2 bothria (no suckers or hooks)
Operculated eggs

43
Q

Diphyllobothrium latum - Life cycle

A

Operculated eggs escape intestine
Coracidium hatch in water and eaten by copepod
Develops into a proceroid
Copepod eaten by a fish, becomes plerocercoid in fish muscles
Host eats fish with plerocercoid

44
Q

Spirometra mansonoides - Life cycle

A

Operculated eggs escape intestine
Coracidium hatch in water and eaten by copepod
Develops into a proceroid
Copepod eaten by a frog, water snake, or rodent and becomes plerocercoid in SQ tissue
Host eats fish with plerocercoid

45
Q

Pseudophyllidea - PPP

A

2-6 weeks

46
Q

Pseudophyllidea - Pathology

A

Not in dogs and cats

47
Q

Pseudophyllidea - Clinical signs

A

None

48
Q

Pseudophyllidea - Diagnosis

A

Fecal sedimentation

Recovery of gravid segments in feces

49
Q

Diphyllobothrium latum - Treatment

A

None approved

Praziquantel

50
Q

Spirometra mansonoides - Treatment

A

None approved

Praziquantel

51
Q

Diphyllobothrium latum - Public health

A

Humans infected as a result of eating undercooked fish

Vitamin B12 deficiency, diarrhea, constipation, abdominal pain, fatigue

52
Q

Spirometra mansonoides - Public health

A

Humans can be paratenic or second IH
Acquired by drinking contaminated water or eating undercooked fish
Cause sparganosis
Neurological symptoms

DMP 718 - Veterinary Parasitology (8 decks)

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