Ectoparasite Review Questions Flashcards

1
Q

Are fleas host specific?

A

No, they have a predisposition, but will take any they can get.

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2
Q

What is FAD?

A

Flea Allergy Dermatitis

-allergy to saliva of flea, some animals are hypersensitive.

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3
Q

Which flea species is most common in dogs and cats?

A

Ctenocephalides felis

-85% to 90%

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4
Q

What is another way of dx’ing fleas if there are no fleas present on an animal?

A

The presence of “flea dirt”. This can be distinguished by moistening a cotton ball with water, and placing sample on the cotton ball. If debris turns red, it is flea dirt.

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5
Q

Name two commercial topical flea treatments.

A
  • Advantage (Imidacloprid)

- K9 Advantix (Imidacloprid + Permethrin)

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6
Q

What are the two important groups of lice? Which are sucking, and which are biting?

A
  1. Anoplura - Sucking

2. Mallophaga - Biting / Chewing

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7
Q

Name the three species of lice which we discussed and give which group they belong to.

A

Anoplura

  • Haematopinus spp.
  • Linognathus setosus
  • Polyplax spp.

Mallophaga

  • Felicola subrostratus
  • Trichodectes canis
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8
Q

Where are the egg/nits of lice found?

A

Attached to the hair/feathers on the head, base of ears, and elbow areas. They like dark furred areas.

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9
Q

Name two treatments for lice.

A
  1. Ivermectin

2. Permethrins

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10
Q

Are all mites pathogenic? If not, why?

A

No, not all mites are pathogenic. Some of them are normal fauna of mammals.
-Demodex is only a prob if immune suppressed.

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11
Q

Cheyletiella spp.

A

Walking Dandruff

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12
Q

Sarcoptes

A

Scabies

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13
Q

Notoedres

A

Cat Scabies

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14
Q

Demodex

A

Red Mange or Follicular Mange

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15
Q

Otodectes

A

Ear Mites

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16
Q

Which mite is found by using the cellophane tape method?

A

Cheyletiella spp.

17
Q

Which mite causes very severe pruritus and can be recovered by skin scrape, but this method is not always successful at finding the mite?

A

Sarcoptes scabiei

18
Q

Which mite parasitizes the external ear canal and causes a crusty, thick, black debris?

A

Otodectes cynotis

19
Q

What are two main tick groups, and which one has a scutum?

A
  1. Argasidae

2. Ixodidae - has a scutum

20
Q

Which tick transmits Lyme disease?

A

Ixodes scapularis

21
Q

What is the organism that causes Lyme disease?

A

Borrelia burgdorferi

22
Q

How are tick-borne illnesses dx’ed?

A

ELISA, serological tests.

23
Q

What are some general signs of tick-borne illnesses?

A

Fever, lethargy, anorexia.

24
Q

What is the organism that causes Rocky Mt. Spotted Fever?

A

Rickettsia rickettsii

25
Q

Which fly species is an aggressive blood feeder?

A

Tabanus spp.

-Horsefly & Deerfly

26
Q

Name two species of fly in which the larval stage is found in the stomach.

A

Hypoderma spp. - cattle bot fly

Gasterophilus spp. - bot fly (stomach bot of horses)

27
Q

Where is Oestrus ovis larvae usually found?

A

In the sinuses of sheep.

28
Q

Where is the larval stage of Cuterebra spp. found?

A

Below the skin (subcutaneous).

  • around neck, face, chest of dogs, cats, rabbits, squirrels, mice.
  • or in stomach.
29
Q

What is the treatment method for Cuterebra spp.?

A

Very careful extraction of the larvae. Damaging it will release toxins, and may cause the animal to go into anaphylaxis. Once extracted, the would is treated with antimicrobials.