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Parasitology 376 > Arthropod 3 > Flashcards

Arthropod 3 Flashcards

1
Q

The stable fly:

What is the genus and species?

A

Stomoxys calcitrans

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2
Q

What is a distinguishing feature of Stomoxys calcitrans?

A

4 longitudinal dark stripes on the thorax and 3-4 dark spots on the abdomen

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3
Q

Which fly has BOTH sexes feeding on blood?

A

Stomoxys calcitrans (the stable fly)

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4
Q

Where on the body does Stomoxys calcitrans bite?

A

On the belly & legs

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5
Q

Is the stable fly a strong or weak flyer?

A

Strong

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6
Q

Stable flies will lay eggs and larva will feed in moist, decaying vegetable debris including manure. Does their life cycle require manure?

A

NO

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7
Q
  1. For what are Stomoxys calcitrans mechanical vectors for?
  2. For what are Stomoxys calcitrans biological vectors for?
A
  1. Mechanical vector : Trypanosomes
  2. Biological vectors : Habronema microstoma
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8
Q

The horn fly:

What is the genus and species?

A

Haematobia irritans

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9
Q

Is the horn fly a strong or weak flyer?

A

Weak

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10
Q

Haematobia irritans will congregate on the back, withers, and around the head at what hours?

A

Day AND night

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11
Q

Is Haematobia irritans dependent on fresh cow manure?

A

Yes

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12
Q

Haematobia irritans overwinter as what?

A

Pupae

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13
Q

200 flies per animal is considered the economic threshold for which fly species?

A

Haematobia irritans (the horn fly)

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14
Q

Haematobia irritans:

Greater than ___ flies/animal can decrease weight gain 40-90 grams/day.

A

700

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15
Q
  1. For what is Haematobia irritans a vector?
  2. Is it biological or mechanical?
A
  1. Stephenofilaria
  2. Biological vector
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16
Q

Where can the Tse-Tse fly be found geographically?

A

Africa ONLY

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17
Q

What is special about the gestation and parturition of the tse-tse fly?

A

The female tse-tse fly bears only one larva at a time. When extruded from the female, the fully developed 3rd stage larva almost immediately borrows into the soil and pupates.

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18
Q

The sheep ked:

What is the genus and species?

A

Melophagus ovinus

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19
Q

Which two flies retain their larvae in their abdomens until they are ready to pupate?

A

Tse-tse fly (Glossina spp.)

Sheep ked (Hippoboscids)

20
Q

What the genus and species associated with the “pupal case”?

A

Melophagus ovinus

“The sheep ked”

21
Q

What is the genus and species of the insect that spends its entire life cycle on its host?

A

Melophagus ovinus

“The sheep ked”

22
Q

For what is Melophagus ovinus a vector?

A

Trypanosoma malophagium

23
Q

True or False:

  1. Melophagus ovinus is adequately controlled by most insecticides.
  2. For Melophagus ovinus, the larva are unaffected by most treatment.
A
  1. TRUE
  2. FALSE - pupae are unaffected by most treatments
24
Q

Because the pupae of Melophagus ovinus are unaffected by most treatments, how must you treat to be successful?

A

Treat twice with 1 month between treatments

Best to treat after shearing

25
Q

The invasion of tissue or organs of host animals by larval flies usually known as maggots or grubs.

A

Myiasis

26
Q

Which flies undergo cutaneous myiasis?

A

Screwworms

Blowflies

Flesh flies

Skin bots

27
Q

Which flies undergo internal myiasis?

A

Nose bots

Stomach bots

Cattle grubs

28
Q

Where do blowflies lay there eggs?

A

Wounded, infected, or soiled skin of mammals

29
Q

Blowflies:

What are their females, oviparous, oviviparous, viviparous?

A

Oviparous

30
Q

Which flies are associated with the “strike zone”?

A

Blowflies

31
Q

How many instars are there while blowflies feed on host tissues?

A

3

32
Q

What are the 3 genera of blowfly?

A

Calliphora

Lucilia

Phormia

33
Q

The primary screwworm:

What is the genus and species?

A

Cochliomyia hominivorax

34
Q

True or False:

Cochliomyia hominivorax (the primary screwwrom) is found in the United States.

A

FALSE

35
Q

True or False:
The primary screwworm is a facultative ectoparasite.

A

FALSE

The primary screwworm is an obligate ectoparasite.

36
Q

Where does Cochliomyia hominivorax lay its eggs?

A

Fresh, uninfected wounds of all kinds

37
Q

What allows for the elimination of the primary screwworm?

A

Traps

&

Sterilization programs

38
Q

The flesh flies:

What is the genus?

A
39
Q

What are Sarcophaga females, oviparous, viviparous, etc?

A

Larviparous (lay larva)

40
Q

Sarchophaga:
Falcultative or obligate parasite?

A

Falcultative

41
Q

With which do the larvae appear in the wound instantaneously?

A

Sarcophaga

42
Q

Wohlfahrtia:

Falcultative or obligate parasite?

A

Obligate parasite

43
Q

Wohlfahrtia:
Females are what, viviparous, oviparous, etc?

A

Larviparous (lay larva)

44
Q

Wohlfahrtia vigil pentrate normal skin of a newborn and grow in a ___ ___.

A

Hypodermal pocket

45
Q

True or False:
The tough skin of older animals is not susceptible to an infection with Wohlfahrtia vigil.

A

TRUE

46
Q
  1. What caused this?
  2. What is the cavitation called?
A
  1. Wohlfahrtia vigil
  2. Hypodermal pocket
47
Q
A

Parasitology 376 (20 decks)

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