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Parasit Exam 3 > Acari 1 > Flashcards

Acari 1 Flashcards

1
Q

Arachnids

-identification

A
  • nymphs and adults: four pairs of legs
  • larvae: 3 pairs of legs
  • body: cephalo-thorax and abdomen
  • no antennae
  • palps
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2
Q

Ixodidae

A

hard ticks

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3
Q

Ixodid

-LC

A

-time taken to complete its LC depends on species of tick, environmental conditions, availability of suitable hosts

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4
Q

Ixodids

-damaging effects

A
  • suck blood
  • lesions from mouthparts predispose for other infections
  • transmission of dz
  • tick paralysis
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5
Q

Ixodes

  • common name
  • hosts
A
  • Black-legged tick or deer tick

- all mammals & birds & HUMANS. Larvae and nymphs of some species feed on mice and adults on deer

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6
Q

Ixodes

-indentification

A

-small dark brown, no festoons, long palps, inornate scutum. Anal groove forms an arch anterior to anus

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7
Q

Ixodes

-LC

A
  • Three host tick
  • requires adult females to engorge in fall, overwinter and lay eggs in spring. However, when adult females do not find suitable host, LC will take longer to complete
  • when same delays occur w/ other tick stages, development will also take longer, up to 4 yrs
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8
Q

Ixodes

-site of infection

A

-skin. all over body; especially axilla inguinal region, face and ears

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9
Q

Ixodes

-pathogenesis & lesions.CL

A
  • paralysis in animals
  • local skin rxns to bites
  • transmits Borrelia burgdorferi (Lyme Dz), granulocytic anaplasmosis and human babesiosis
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10
Q

Ixodes

-Dx

A

engorged females seen easily

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11
Q

Dermacentor

  • common names
  • Dermacentor variabilis
  • D. andersoni
A
  • D. variabilis: american dog tick
  • D. andersoni: rocky mt. wood tick
  • D. albipictus: winter or elk tick
  • D. nitens: tropical horse tick
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12
Q

Dermacentor

-Hosts

A

-larvae and nymphs feed on small rodents. adults feed on dogs, large hosts, humans. Most common tick on dogs in North America

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13
Q

Dermacentor

-identification

A

-rectangular basis capituli, short palps, ornate scutum, festoons

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14
Q

Dermacentor

-LC

A
  • 3 host tick

- to complete LC several take months-years

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15
Q

Dermacentor

-site of infestation

A

skin around head and neck

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16
Q

Dermacentor

-pathogenesis & lesions/CS

A

-transmits Rocky Mt Spotted Fever (RMSF), sytauxzoonosis, tularemia, tick paralysis

17
Q

Rhipicephalus sanguineus

  • common name
  • host
A
  • brown dog tick or kennel tick

- dogs and humans. most common in southern US

18
Q

Rhipicephalus sanguineus

-ID

A

-hexagonal basis capituli, inornate scutum, short palps, festoons

19
Q

Rhipicephalus sanguineus

-LC

A

-3 host tick. tick has adapted extremely well to indoor living

20
Q

Rhipicephalus sanguineus

-site of infestation

A
  • skin

- adults prefer skin b/t toes and ears, larvae and nymphs often at the back of neck

21
Q

Rhipicephalus sanguineus

-pathogenesis & lesions/CS

A

-transmits babesia and ehrlichia canis, transmits many infectious organisms and RMSF

22
Q

Ticks in dogs and cats:

Tx & prevention

A
  • ticks can be removed manually

- regular application of acaricides

23
Q

Rhipicephalus (Boophilus)

  • common name
  • host
A
  • Rhipicephalus: blue tick
  • R. annulatus: cattle fever tick
  • R. microplus: tropical cattle tick
  • cattle & other large hosts
24
Q

Rhipicephalus (Boophilus)

  • identification
  • LC
  • site of infestation
A
  • hexagonal basis capituli, prominent dorsal ridges, short palps
  • LC: 1 host tick
  • adults on ventral aspects of body, immature in ears
25
Q

Rhipicephalus (Boophilus)

-pathogenesis, lesions, CS

A
  • bovine piroplasmosis

- gallsickness

26
Q

Rhipicephalus (Boophilus)

-Tx & prevention

A
  • several parasiticides effective
  • difference if lactating dairy cattle
  • suspected ticks submitted to a regulatory veterinarian
27
Q

Amblyomma

  • common name:
  • Hosts:
A
  • lone star tick, Gulf Coast tick
  • Tropical bont tick, Bont tick
  • HUMANS, livestock, dogs & cats
28
Q

Amblyomma

-identification

A
  • long palps and ornate scutum
  • banded legs
  • A. americanum “lone star tick” single white spot on female scutum
29
Q

Amblyomma

-LC

A

3 host tick

30
Q

Amblyomma

  • site of infestation
  • pathogenesis, lesions, CS
A

-aduts prefer head, ears & neck
-long mouthparts = painful bites
-transmit dz:
Rickettsial, Hepatozoon, cytauxzoon

31
Q

Amblyomma

-tx & prevention

A
  • several parasiticides effevctive

- difference if lactating dairy cattle

Parasit Exam 3 (11 decks)

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