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RUSVM Parasit SPR 2020 > ARACHNIDS: Ixodidae spp. > Flashcards

ARACHNIDS: Ixodidae spp. Flashcards

1
Q

What characteristics are associated with arachnids?

A
  • Palps, no antennae
  • Egg - Larvae - Nymphs - Adults
  • Larvae have 3 pairs of legs
  • Cephalothorax and abdominal regions
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2
Q

Ixodids are considered ____ ______, as a result of their scutum present on their abdomen.

A

Hard ticks

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3
Q

What factors are associated with ixodid life cycle timing?

A
  • Species of ticks
  • Environmental conditions
  • Availability of suitable hosts
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4
Q

What damaging effects are they asociated with?

A
  • Sucking blood
  • Disease transmission
  • Tick paralysis
  • Lesions
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5
Q

What is the common name for Ixodes spp.?

A

Black-legged tick, Deer tick

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6
Q

What can larvae and nymphs feed on during development?

A

Larvae = mice

Nymphs = deer

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7
Q

How can Ixodes be identified based on their morphology

A
  • No festoons
  • Long palps
  • Inornate scutum
  • Anterior groove forms an arch to the anus
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8
Q

What characteristics are associated with the Ixodes spp.?

A
  • Three host tick
  • Females engorge themselves, small scutum
    • Lay eggs in spring after overwintering
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9
Q

What areas are highly prevalent to Ixodes infestations?

A

Axilla, ears, inguinal region, and face

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10
Q

What bacterium is transmitted by Ixodes?

A

Borrelia burgdorferi, anaplasma, and Babesia microti

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11
Q

What common names are associated with Dermacentor spp.?

A
  • D. variabilis* = American dog tick
  • D. andersoni* = RM Wood tick
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12
Q

Dermacentor larvae and nymphs will feed on _________, while adults will feed on dogs, people, and large hosts.

A

Rodents

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13
Q

True or False: Dermacentor spp. are the most common ticks in N. America.

A

True

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14
Q

How can Dermacentor adults be identified based on their morphology?

A
  • Rectangular basis capituli
  • Short palps
  • Ornate scutum
  • Festoons
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15
Q

What areas are higly prevalent to infestations of Dermacentor spp.?

A

Head and neck

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16
Q

What transmission is associated with Dermacentor?

A

RMSF, cytauzoonosis, tularemia, and tick paralysis

17
Q

What is the common name for Rhipicephalus sanguineus?

A

Brown dog tick, Kennel tick

18
Q

What tick is the most common in the southern U.S., and has also adapted to living indoors?

A

Rhipicephalus sanguineus

19
Q

How can Rhipicephalus sanguineus be identified based on its morphology?

A
  • Hexagonal basis capituli
  • Short palps
  • Inornate scutum
  • Festoons
20
Q

Where will Rhipicephalus sanguinues be most likely found?

A

Adults = skin between ears and toes

Larvae/ Nymphs = back of neck

21
Q

What transmission is associated with Rhipicephalus sanguineus?

A

Babesia canis, Ehrlichia canis, RMSF, and also tick paralysis

22
Q

What is associated with tick paralysis?

A

The presence of a neurotoxin produced in the tick’s salivary gland.

After prolonged attachment, the engorged tick transmits the toxin to its host, leading to paralysis.

23
Q

What common names are associated with Rhipicephalus (Boophilus) spp.?

A
  • Rhipicephalus spp. = blue tick
  • R. annulatus = cattle fever tick
  • R. microplus = tropical cattle tick
24
Q

How can Rhipicephalus (Boophilus) spp. be identified based on their morphology?

A
  • Hexagonal basis capituli
  • Prominent dorsal ridges
  • Short palps
25
Q

Where will Boophilus spp. infest cattle and other large hosts?

A

Adults = ventral aspect of the body

Immatures = ears

26
Q

What pathogenesis is associated with Rhipicephalus (**Boophilus) spp.?

A

Bovine piroplasmosis (Babesia bigemina), gallsickness (Anaplasma marginale), Texas cattle fever

27
Q

What tick species is reportable?

A

Rhipicephalus (Boophilus) spp.

28
Q

What common name is associated with Amblyomma spp.?

A

Lone star tick, Gulf Coast tick, Tropical bont tick, Bont tick

29
Q

What morphology is associated with Amblyomma spp.?

A
  • Ornate
  • Long mouthparts (deep painful bites) and palps
  • Banded legs
30
Q

What member of the Amblyomma spp. has a single white spot on the female scutum?

A

Amblyomma americanum

31
Q

Rhipicephalus (Boophilus) spp. are the only ______ host tick.

A

Single/ One

32
Q

Where do adult Amblyomma reside?

A

Head, ears, and neck

33
Q

What transmission is associated with Amblyomma spp.?

A

Cytauxzoon felis, Hepatozoon americanum by A. maculatum, Ricketts (heartwater)

RUSVM Parasit SPR 2020 (25 decks)

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