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Parasit Exam 3 > Acari 2 > Flashcards

Acari 2 Flashcards

1
Q

Argasid ticks

A
  • soft ticks
  • no dorsal shield, scutum
  • leathery tegument, spinose and bumpy
  • mouthparts ventrally placed, so not visible dorsally
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2
Q

Otobius

  • common name
  • hosts
  • identification
A
  • spinose ear tick
  • livestock, humans, dogs
  • mouthparts not visible dorsally, integument short sharp spines
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3
Q

Otobius

-LC

A
  • adults are not on the animal and do not feed!

- larvae and nymphs “taxied” long distances

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4
Q

Otobius

-Pathogenesis, lesions/ CS

A
  • ear canals affected seriously in large tick buildups

- heavy infestations lead to anemia

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5
Q

Otobius

-Tx and prevention

A
  • topical use of acaricidal applications in ear canals

- tx of premises

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6
Q

Argas

  • common name
  • host
A
  • fowl tick

- domestic and wild fowl

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7
Q

Argas

-ID

A

-soft tick, leathery, textures body, lateral line, genital pore in larger female

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8
Q

Argasids:

A
  • engorge rapidly to take advantage of available host
  • survive arid conditions
  • frequent feeding leads to opportunities to transmit pathogens
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9
Q

Argas

-site of infestation

A

on skin, but most of the time hide away from hosts

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10
Q

Acari (MItes)

-ID

A

-microscopic, body has scales, spines, setae (hairs), legs may have claws or suckers used to attach to host

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11
Q

Acari (mites)

-different strategies

A
  • burrow into the host epidermis
  • non burrowing; on skin surface
  • restricted to an area of the body
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12
Q

Sarcoptes scabiei

  • common name
  • hosts
A
  • Sarcoptic mange mite, itch mite, scabies mite

- all domestic animals and humans

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13
Q

Sarcoptes scabiei

-ID

A

-round, legs short, suckers on long unsegmented stalks differ b/t sexes

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14
Q

Sarcoptes scabiei

  • Site of infestation
  • Pathogenesis and lesions
A
  • skin

- erythema, scale and crust formation

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15
Q

Sarcoptes scabiei-dog

-CS

A
  • Begins on hairless areas of the body, lateral elbow and pinna of ear are common starting places
  • Lesions of follicular papules, areas of erythema, crusts of dried serum and blood and pruritis
  • thickened ear
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16
Q

Sarcoptes scabiei-dog

  • Dx
  • Tx & prevention
A
  • skin scraping but recovery of mite difficult

- MCLs, tx of pets cures the humans they infest

17
Q

Sarcoptes scabiei-swine

-main mode of transmission

A
  • carrier sows to piglets during suckling
  • during service b/t infested boars to gilts
  • piglets: signs appear w/in 3 weeks of birth
18
Q

Sarcoptes scabiei-swine

-pathogenesis and lesions/CS

A
  • pigs scratch continuoisly and lose condition
  • first lesions are wheals; general erythema around eyes, snout, external ears, front of hocks
  • progress to scabs
  • skin becomes wrinkled, covered w/ crusty lesions, thickened
  • lesions progress to hyperkeratosis
19
Q

Sarcoptes scabiei-swine

-Dx

A
  • mites in wax from ear

- pruritus is frequently a better indicator of infestation than mite recovery, especially in sows and nursing piglets

20
Q

Sarcoptes scabiei-swine

-Tx & prevention

A
  • tx sow before farrowing

- macrocyclic lactones

21
Q

Sarcoptes scabiei-cattle

-sites of infestation

A

-epidermal layers of skin

22
Q

Sarcoptes scabiei-cattle

-pathogenesis/lesions/CS

A
  • potentially most sever cattle mange
  • mild infection-scaly skin
  • severe infection-thickened skin
  • downgrading of hides, drop in meat and milk production
23
Q

Sarcoptes scabiei-cattle

  • Dx
  • Tx & prevention
A
  • skin scrapping
  • MUST BE REPORTED
  • MCLs
  • eprinomectin approved for lactating dairy cattle
24
Q

Notoedres cati

  • common name
  • hosts
A
  • noteodric cat mite

- cat, dog, rabbit

25
Q

Notoedres cati

  • location of infestation
  • Dx
A
  • head

- skin scraping

26
Q

Knemidocoptes

  • common name
  • hosts
  • ID
A
  • Scaly leg or face mite
  • chickens & turkeys, cage birds
  • adult mites spherical
27
Q

Knemidocoptes

  • LC
  • Site of infestation
A
  • entire life cycle on host

- under scales of leg, comb, wattles, neck

28
Q

Knemidocoptes

  • Pathogenesis/lesions/CS
  • Dx
A
  • Inflammation and keratinization of skin of legs & face
  • lameness
  • ID mite
29
Q

Chorioptes bovis

  • hosts:
  • Identification:
A

cattle, small ruminants, equids

  • rounded mouthparts
  • sucker shape at end of stalks
30
Q

Chorioptes bovis

-LC

A
  • non-burrowing
  • feeds on skin surface and epithelial debris
  • female: lives 4-6w, lays approx 90 eggs
  • ELNA
31
Q

Chorioptes bovis

  • site of infestation
  • pathogenesis/lesions/CS
A
  • tailhead, udder & legs

- late winter, mild condition, damages hides

32
Q

Chorioptes bovis

  • Dx
  • Tx/prevention
A
  • skin scraping

- standard louse tx, MCLs

Parasit Exam 3 (11 decks)

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