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Parasitology > Helminth Introduction > Flashcards

Helminth Introduction Flashcards

1
Q

What kind of parasites are helminths?

A

Endoparasites (like protozoa)

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2
Q

What is the body shape of Acanthocephalans?

A

Long

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3
Q

What is the body shape of nematodes?

A

Long

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4
Q

What is the body shape of cestodes?

A

Segmented

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5
Q

What is the body shape of trematodes?

A

Leaf-like

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6
Q

What is coleomate?

A

There is a body cavity with mesoderm keeping everything in the right position

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7
Q

What is pseudoceolomate?

A

Has a body cavity but the mesoderm only covers the inner lining so the internal organs are loosely in place

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8
Q

What is acoelomate?

A

There is no body cavity, it is all parenchyma/tissue

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9
Q

What are the acoelomates?

A

Trematodes

Cestodes

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10
Q

What are the pseudocoelomates?

A

Nematodes

Acanthocephalans

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11
Q

What kind of digestive tract do nematodes have?

A

Complete, they have a feeding mechanism and excretory mechanism

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12
Q

What kind of digestive tract do trematodes have?

A

Partial digestive tract

They have a feeding mechanism but no excretory

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13
Q

What kind of digestive tract do cestodes have?

A

They do not have a digestive tract

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14
Q

What kind of digestive tract do acanthocephalans have?

A

They do not have a digestive tract

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15
Q

Which helminths are dioecious?

A

Acanthoccephalans and

Nematodes

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16
Q

Which helminths are monoecious?

A

Cestodes and Trematodes

17
Q

What are the general characteristics of nematodes?

A

Long, round, unsegmented
Pseudocoelomate
Complete digestive tract
Dioecious

18
Q

What are the general characteristics of cestodes?

A

Long, dorsoventrally flat, segmented
Acoelomate
Lack digestive tract
Monoecious

19
Q

What are the general characteristics of trematodes?

A

Dorsoventrally flattened, unsegmented
Acoelomate
Incomplete digestive tract
Monoecious (except for Schistosoma, which the make and female are separate but very close together)

20
Q

Why are the female and male Schistosoma very close together?

A

The female is very small and the male gives her a place to blood-feed and a way to get to where she needs to be safely

21
Q

What are the general characteristics of acanthocephalans?

A 
Long, rounded, unsegmented
Pseudocoelomate
Lack digestive tract
Dioecious
Anterior spiny proboscis
22
Q

Is the female or male acanthocephalan larger?

A

Female

23
Q

What does the Acanthocephalan life cycle require?

A

An intermediate host

24
Q

What causes inflammation/pathology with Acanthocephalans?

A

Proboscis

25
Q

What is the definitive host of Macracanthorhynchus hirudinaceus?

A

Swine (adult worms in small intestine)

26
Q

What is the intermediate host of Macracanthorhynchus hirudinaceus?

A

Grubs (larvae)

27
Q

What is the zoonosis of Marcacanthorhynchus hirudinaceus?

A

May be zoonotic

28
Q

What is the PPP of Marcanthorhynchus hirudinaceus?

A

2-3 months

29
Q

What is the pathogenesis and clinical signs of Marcanthorhynchus hirudinaceus?

A

Usually no clinical signs

Possible gastrointestinal signs (enteritis/pain, decrease in feeding or weight gain, diarrhea)

30
Q

What is the diagnosis of Marcanthorhynchus hirudinaceus?

A

Eggs in pig feces

31
Q

What is the definitive host of Macracanthorhynchus ingens?

A

Mainly raccoons, but occasional dogs

32
Q

What is the intermediate host of Macracanthorhynchus ingens?

A

Millipedes

Parasitology (27 decks)

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