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Parasit Exam 3 > Insects 3 > Flashcards

Insects 3 Flashcards

1
Q

Cochilomyia hominivorax

  • common name
  • host
A
  • screwworm

- livestock

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2
Q

Cochilomyia hominivorax

-identification

A
  • bluish green flies
  • 3 stripes on thorax
  • orange brown eyes
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3
Q

Cochliomyia hominivorax

-LC

A

larvae feed invasively on living tissue

-adult females only mate once in entire life

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4
Q

Cochilomyia hominivorax

-Site of infection

A

eggs laid fresh, uninfected wounds

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5
Q

Cochliomyia hominivorax

-pathogenesis, lesions, CS

A

-wounds attract female flies
-causes “blowfly strike”
-foul smelling lesion
-rapidly leads to death of host
REPORTABLE

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6
Q

Cochliomyia hominivorax

  • Dx
  • Tx & prevention
A
  • recognition of maggots in lesions
  • must report to vet authorities immediately
  • place diptera larve in alcohol
  • treat wounds
  • releasing sterile males
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7
Q

Sarcophagidae

  • common name
  • host
  • identification
A
  • flesh fly
  • any animal
  • instars larger than houseflies
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8
Q

Sarcophagidae

-LC

A
  • Lay 1st stage instars in sores, wounds, necrotic tissue, wool soiled w/ feces or urine
  • devlop to 3rd stage instars and leave host to pupate
  • pupae overwintering stage
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9
Q

Sarcophagidae

-Site of infection

A

skin, wool

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10
Q

Sarcophagidae

  • Dx
  • Tx & prevention
A
  • fly identification
  • prevent situations that attract flies
  • sanitation, improved husbandry, tail docking
  • tx wounds immediately
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11
Q

Phthiraptera

A

lice

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12
Q

Ischnocera (mallophaga)

A
  • biting, chewing lice
  • mandible mouthparts > thorax
  • feed on skin, hair, feathers
  • yellow
  • rapid movement to move over skin and covering
  • often bird lice
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13
Q

Trichodectes canis

  • common name
  • host
A
  • dog biting louse or canine chewing louse

- dogs

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14
Q

Trichodectes canis

-identification

A

yellowish color, biting/chewing mouthparts, active louse

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15
Q

Trichodectes canis

LC

A

female lays eggs, develop to nymphs and adults. Require host to complete LC

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16
Q

Trichodectes canis

  • site of infection
  • pathogenesis & lesions
A
  • hair, skin

- vector of D. caninum, heavy infestations in negleted and underfed animals. Affects young*

17
Q

Trichodectes canis

CS

A
  • pruritus
  • dogs scratch, causes loss of hair
  • restless and scratch continuously
18
Q

Trichodectes canis
-Dx
Tx & prevention

A
  • identify louse

- avoid direct contact w/ brushes, combs, blankets

19
Q

Felicola subrostratus

  • common name
  • hosts
A
  • cat biting louse

- cats

20
Q

Felicola subrostratus

-identification

A

beige or yellow color, transverse brown bands, triangular anterior portion of head, small legs

21
Q

Felicola subrostratus

  • Predilection site:
  • Pathogenesis
  • Dx
A
  • skin, face, pinnae, back
  • elderly or chronically ill animals; longhaired breeds
  • louse identification
22
Q

Damalinia bovis

  • common name
  • host
A

cattle biting louse

cattle

23
Q

Damalinia bovis

-identification

A

typical ischnoceran, reddish brown color

24
Q

Damalinia bovis

-site of infestation

A

head, poll, neck, shoulders, rump, tail switch

25
Q

Damalinia bovis

-LC

A

-winter favors proliferation: thick coat, cattle house,
parthenogenesis
-in summer, lice numbers are low: thin pelage limits shelter habitat, skin surface temp high, sunlight is lethal

26
Q

Damalinia bovis

-Pathogenesis, lesions, CS

A
  • chronic dermatitis
  • in large numbers intensive irritation and pruritus
  • sign of malnutrition or chronic dz
27
Q

Damalinia bovis

  • Dx
  • Tx & prevention
A
  • identify louse
  • various ectoparasiticides
  • MCLs
28
Q

Damalinia ovis

  • common name
  • host
A
  • biting louse of sheep

- sheep and goats

29
Q

Damalinia ovis

  • site of infestation
  • pathogenesis and lesions/CS
A
  • wool over whole body
  • most pathogenic of all sheep lice
  • highly active
  • lose body condition
  • damage to fleece
  • attractant for blowflies
30
Q

Damalinia ovis

  • Dx
  • Tx & prevention
A
  • louse ID

- several remedies effective

31
Q

Ischnocera-Avian lice

  • Common name
  • hosts
A
  • biting chewing lice

- domestic and wild fowl

32
Q

Ischnocera-Avian lice

-Site of infestation

A

-note common name ex, wing louse, fluff louse

33
Q

Ischnocera-Avian lice

  • Pathogenesis & lesions
  • CS
A
  • Lice digest keratin, bite feathers
  • sleeplessness, inappetence, scratching, feather plucking
  • effects of pediculosis similar among host species
  • secondary effects may be more serious than the immediate damage of lice

Parasit Exam 3 (11 decks)

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