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Parasitology - Endoparasites > Intro to parasites > Flashcards

Intro to parasites Flashcards

1
Q

What is a parasite?

A

An organism that is metabolically dependent on another, where that organism benefits at the expense of another

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2
Q

What is the name for worms?

A

Helminths

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3
Q

What are the 2 types of helminths and what are these?

A

Nematodes (roundworms)

Platyhelminths (flatworms e.g. cestodes, fluke)

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4
Q

What is the group of parasites containing arachnids and insects?

A

Arthropods

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5
Q

What is the single-celled eukaryote parasite?

A

Protozoa

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6
Q

What is the name of an anti-worming drug?

A

Anthelmintic

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7
Q

What is the name for a species of parasite that has 2 separate sexes?

A

Dioecious

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8
Q

What is a direct life cycle?

A

Parasite only goes through 1 host

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9
Q

What is an indirect life cycle?

A

Parasite goes through multiple hosts

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10
Q

When can harm be caused by parasites?

A

If large numbers
On certain sites
Particular feeding habits
Competing for nutrients

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11
Q

What are the impacts of parasites?

A

Impact on welfare
Cost
Disease
Decreased productivity

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12
Q

What is the aim of parasites when living on a host? How are they not killed by the host immune system?

A

Live long enough to reproduce

Suppress, evade or manipulate the host immune response

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13
Q

What is the word for parasitic eggs?

A

Ova/ovum

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14
Q

What is an immature stage parasite called?

A

Larvae

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15
Q

What is ecdysis? What is the purpose of ecdysis?

A

Shedding/moult of cuticle between larval stages

Allows growth - very little morphological change

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16
Q

What does oviparous reproduction mean?

A

Female lays eggs which are passed out from host (excreted in faeces)

17
Q

What does ovoviviparous reproduction mean?

A

Female produces larvated eggs which hatch before being passed out from host

18
Q

What does viviparous reproduction mean?

A

Female produces live larvae

19
Q

What is a definitive host?

A

Final host, where adult parasite is found

20
Q

What is an intermediate host?

A

Host where development takes place. Would not be infectious to definitive host yet, need intermediate host for development

21
Q

What is the prepatent period?

A

Time period between entry of infective stage parasite into host and presence of parasite within host (detect eggs in faeces)

Parasitology - Endoparasites (9 decks)

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