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Parasitology > Fleas & Lice (24) > Flashcards

Fleas & Lice (24) Flashcards

1
Q

What is the cat flea called?

A

ctenocephalides felis

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2
Q

In ctenocephalides felis, ____ are parasitic on the host

A

adults

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3
Q

Ctenophalides felis feed on ______

A

defecated blood and organic debris in environment

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4
Q

Which flea type is the most common dogs?

A

ctenocephalides felis

NOT canis which is 12-20%

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5
Q

What is the false human flea?

A

pulex simulans

found on wild canids like coyotes

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6
Q

Why are fleas important?

A

important biological vectors and intermediate hosts for parasites, viruses, and bacteria

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7
Q

What is the flea biology?

A

adults are obligate blood suckers

larval stages feed on digested blood and organic debris like dander, dried feces

newly hatched adults able to survive long periods of starvation

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8
Q

How do you control flea infestations?

A

must be directed at all stages of life cycles

fleas on primary host and secondary host

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9
Q

Which stage of fleas are obligate blood suckers?

A

adults

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10
Q

Which products kill fleas on the host?

A

frontline (fipronil)
advantage (imidacloprid)
isoxazolines (afoxolaner, sarolaner, furlaner)
revolution (selemectin)
capstar (nitenpyram)
comfortis (spinosad)
seresto collar

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11
Q

How does frontline work for flea control?

A

blocks GABA-regulated chloride channels

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12
Q

How does advantage work for flea prevention?

A

CNS impairment and death to fleas by acting on nicotinic acetylcholine receptors

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13
Q

How does isoxazolines work for flea prevention?

A

CNS impairment by inhibition of GABA

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14
Q

How does revolution work for flea prevention?

A

similar to ivermectin

stimulates GABA-regulated chloride channels, muscular paralysis and death to arthropods

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15
Q

How does capstar work for flea prevention?

A

ties up nicotinic acid receptors and death to fleas within 3 hours

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16
Q

How does confortis work for flea prevention?

A

active binding on nicotinic acetylcholine receptors

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17
Q

How does vector 3D work for flea prevention?

A

inhibits nicotinic acetylcholine receptors resulting gin death by CNS impairment

18
Q

How does Nexgard work for flea prevention?

A

blocks GABA-gated chloride

19
Q

What are the 4 activities you need for successful mitigation of all flea-related infestations?

A
  1. killing fleas on primary host
  2. killing adult fleas on reservoir hosts
  3. preventing fleas from immediate reinfestation
  4. elimination of larval states in the environment

failure to follow through on any single activity results in a perception of treatment failure

20
Q

What is the lifecycle of chewing and sucking lice?

A

direct lifecycle

21
Q

T/F: Chewing and sucking lice are poorly adapted for life off the host

A

TRUE

22
Q

T/F: Chewing and sucking lice are very host specific

A

TRUE

23
Q

What are lice eggs called?

A

nits

24
Q

Which species is chewing lice on?

A

birds
cats

25
Q

How do you differentiate chewing and sucking lice?

A

chewing: cats and birds
> head wider than thorax

sucking: dogs, goats, horses, cows, etc
» head more narrow than thorax

26
Q

In chewing lice, the head is [narrower/wider] than the thorax. In sucking lice, the head is [narrower/wider] than the thorax

A

chewing: wider
sucking: narrower

27
Q

What is this? Be specific

A

sucking louse (remember, head is narrower than thorax)

28
Q

What is this? Be specific

A

chewing louse (remember, head is wider than thorax)

29
Q

What is the general term for louse infestation?

A

pediculosis

30
Q

Pediculosis is often associated with _____

A

young animals

31
Q

T/F: Pediculosis has a seasonal distribution

A

TRUE

32
Q

How do you treat pediculosis in companion animals?

A

fipronil
imidacloprid
selamectin

33
Q

How do you treat pediculosis in domestic livestock?

A

macrocyclic lactones

34
Q

What is human pediculosis?

A

humans get lice from other humans
“head lice”
treat based on OTC pyrethroid products

35
Q

T/F: Humans can get pediculosis from dogs

A

FALSE - very host specific!

36
Q

What are true bugs called?

A

hemiptera

37
Q

What are kissing bugs?

A

reduviid bugs or assassin bugs

38
Q

What do reduviid bugs do?

A

visit host for blood meal

IH for trypanosome cruzi

dogs and cats are the host

39
Q

What do bedbugs, aka cimex lectularius do?

A

visit host for blood meal

voracious blood suckers

rabbit, poultry, and pigeon colonies

40
Q

What is the formal term for bedbugs?

A

cimix lectularius

Parasitology (31 decks)

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