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Parasit Exam 3 > Acari 3 > Flashcards

Acari 3 Flashcards

1
Q

Psoroptes ovis

  • common name
  • hosts
A
  • sheep scab mite

- sheep, cattle

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2
Q

Psoroptes ovis

-ID

A
  • non-burrowing mite
  • oval w/ pointed mouthparts for piercing and chewing
  • causes “scab” mange
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3
Q

Psoroptes ovis

  • LC
  • Site of infestation
A
  • mouthparts pierce and chew unique to these mites
  • forms scab
  • skin
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4
Q

Psoroptes ovis

-seasons

A
  • reservoir sites during non-winter months

- rapid spread in winter

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5
Q

Psoroptes ovis

-pathogenesis/lesions/CS

A
  • zone of inflammation w/ serous exudate
  • dry crust covered center develops w/ moist borders
  • mite activity leads to intense itching, restless rubbing, scratching, ragged wool
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6
Q

Psoroptes ovis
-dx
tx/ prevention

A
  • season, CS, confirmation of mite in scrapping

- acaricidal tx, disinfecting enclosures, REPORTABLE dz

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7
Q

Otodectes cynotis

  • common name
  • hosts
A
  • ear mite

- dogs, cats, ferrets, foxes, rabbits, humans

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8
Q

Otodectes cynotis

-ID

A

-long legs extend beyond body margin, suckers of males and females differ, copious dark cerumen is observed

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9
Q

Otodectes cynotis

  • site of infestation
  • pathogenesis/lesions/CS
A
  • ears
  • in cats, dry waxy parchment-like material in ears w/ large number of mites
  • frequent skaking of head
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10
Q

Otodectes cynotis

  • Dx
  • Tx/prevention
A
  • behavior of animal, exudate in ear canal, mites on slide

- several remedies

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11
Q

Cheyletiella yasguri

  • hosts
  • common name
  • ID
A
  • dogs, HUMANs

- “waist”, walking dandruff, palpal claws

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12
Q

Otodectes cynotis

  • site of infestation:
  • pathogenesis/lesions/CS
  • Dx
A
  • walking mites

- dandruff, adhesive tape or scotch tape swab

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13
Q

Demodex canis

  • common name:
  • hosts
  • ID
A
  • demodectic mange mite, follicle mite
  • dogs
  • “cigars w/ legs”
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14
Q

Demodex canis

-LC

A

-entirely in hair follicles and sebaceous glands. Transmission from bitch to newborns

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15
Q

Demodex canis

  • Site of infestation
  • Pathogenesis/lesions
A
  • hair follicles and sebaceous glands
  • localized demodicosis associated w/ alopecia, erythema and no pruritus. Usually in young animals. Prognosis for clinical recovery excellent
  • hair loss
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16
Q

Generalized demodicosis

A

characterized by 5 or more areas of localized dz or entire body region, hair sparse & skin coarse and dry, develops to “red mange”. Concomitant staphylococcal pyoderma develops, pustules develop, open and ooze. Very difficult to cure

17
Q

Demodex canis

  • Dx
  • Tx & prevention
A
  • skin scrapings can reveal mites. However mites are NORMAL inhabitants so presence does not mean dz
  • Amitraz, Bravecto-Fluralaner
18
Q

Dermanyssus

  • common name
  • host
  • ID
A
  • red chicken mite, roost mite of birds
  • domestic and wild fowl, human
  • engorged females gray to red, needle-like mouthparts
19
Q

Dermanyssus

-site of infestation

A

-night mite, at night, anywhere on skin, during the day hide in cracks

20
Q

Dermanyssus

-pathogenesis/lesions/CS

A
  • change of behavior due to itching
  • weight loss
  • reduced egg yield
  • transmit dz
21
Q

Dermanyssus

-LC

A

survive off of the host for months, life cycle can be completed in less than 7 days
-lay eggs off host

22
Q

Dermanyssus

  • Dx
  • Tx& prevention
A
  • ID, usually at night
  • control proliferation of mites
  • tx bird houses w/ appropriate and suitable parasiticides
23
Q

Ornithonyssus

  • Common name
  • hosts
A
  • Northern fowl mite (O. sylviarum)
  • Tropical fowl mite (O. bursa)
  • chickens, birds, HUMANs
24
Q

Ornithonyssus

-ID

A
  • most common poultry mite!
  • engorged females most often seen
  • grey to red color
  • mouthparts long
25
Q

Ornithonyssus

  • site of infestation
  • pathogenesis/lesions/CS
A
  • on host during day as well as night
  • change of behavior due to itching
  • weight loss
  • reduced egg yield
  • transmit dz
26
Q

Ornithonyssus

  • LC
  • Dx
  • Tx
A
  • Survive off of the host for only a short period (10 days)
  • lay eggs on host
  • Life cycle can be completed in less than 7 days
  • ID
  • Control proliferation of mites

Parasit Exam 3 (11 decks)

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