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Fall 22: Parasites > 21. lice > Flashcards

21. lice Flashcards

1
Q

— are wingless and dorsoventrally
flattened

A

lice

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2
Q

lice have — at the end of their legs to grab hair

A

tarsal claws

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3
Q

lice eggs look

A

whitish, grossly visible and
glued to the shafts of hair/feathers

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4
Q

Heavy infestation of lice is called

A

pediculosis

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5
Q

two groups of lice

A

anoplura (sucking)

mallophaga (chewing)

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6
Q

compare anoplura vs mallophaga lice

A

anoplura (sucking)

mallophaga (chewing)

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7
Q

lifecycle of lice

A

completely obligatory- stay on host

only leave to find new host or if host temperature changes

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8
Q

transmission of lice is mainly by

A

contact

completely obligatory- stay on host

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9
Q

symptoms of lice infestation

A

Annoyance and blood loss

They cause irritation and restlessness

Excessive grooming can cause self-inflicted
wounds

Weight loss and drop in egg production

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10
Q

Pediculus hominus transmits —

A

Rickettsia
prowazeki (epidemic typhus), Borrelia recurrentis (epidemic relapsing fever)

lice- anoplura sucking

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11
Q

Trichodectes canis transmits—

A

Dipylidium caninum

lice- mallophaga- chewing

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12
Q
A

linognathus

long nosed lice
infect goats

L. setosus (dog)
L pedalis (sheep)

Anoplura sucking lice- HLSPP

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13
Q

— are long nosed lice

A

linognathus

Anoplura sucking lice- HLSPP

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14
Q

— are short nosed lice

A

Haematopinus

H. suis (Pigs)
H. eurysternus (Cattle)
H. asini (horse)

Anoplura sucking lice- HLSPP

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15
Q
A

Haematopinus
short nosed lice

Anoplura sucking lice- HLSPP

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16
Q

Haematopinus transmit

A

Eperythrozoon suis

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17
Q

two types of sucking human lice

A

Pthirus
P. pubis (Pubic/crab louse)

Pediculus
P. humanus capitis (Human head louse)
P. humanus humanus (Human body louse)

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18
Q
A

Pthirus
P. pubis (Pubic/crab louse)

human

Anoplura sucking lice- HLSPP

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19
Q
A

Pediculus
P. humanus capitis (Human head louse)
P. humanus humanus (Human body louse)

Anoplura sucking lice- HLSPP

20
Q

Lice of — have 1 claw while those of — have 2 claws

A

mammals
birds

21
Q
A

ischnocera

Mallophaga chewing lice- Ischnocera- DTF, Amblycera- MM

22
Q

— are lice with antennae extend laterally from the head

A

ischnocera

Mallophaga chewing lice- Ischnocera- DTF, Amblycera- MM

23
Q

Ischnocera that infect mammals

A

Damalina, Trichodectes & Felicola

Mallophaga chewing lice- Ischnocera- DTF, Amblycera- MM

24
Q

Ischnocera that infect birds

A

Cuclotogaster & Columbicola

have two claws

25
Q

lice

A

ambylcera
antennae are recessed into grooves in the head

Mallophaga chewing lice- Ischnocera- DTF, Amblycera- MM

26
Q

MENACANTHUS STRAMINEUS infect

A

found in thigh, breast and vent of birds

antennae are recessed

Mallophaga chewing lice- Ischnocera- DTF, Amblycera- MM

27
Q

found in feather shaft of chicken

A

Menopon gallinae

Mallophaga chewing lice- Ischnocera- DTF, Amblycera- MM

28
Q

feather shaft lice of chickens

A

Menopon gallinae

Mallophaga chewing lice- Ischnocera- DTF, Amblycera- MM

29
Q

found on cattle

A

Damalinia bovis

live on top of head, shoulders, neck, back and rump

leads to alopecia

Mallophaga chewing lice- Ischnocera- DTF, Amblycera- MM

30
Q

Damalinia bovis feed on

A

feed on hair shafts, dermal
scales and blood scabs

lice of cattle

Mallophaga chewing lice- Ischnocera- DTF, Amblycera- MM

31
Q

dog lice

A

Trichodectes canis

Transmits Dipylidium
caninum

Mallophaga chewing lice- Ischnocera- DTF, Amblycera- MM

32
Q

Trichodected canis transmit

A

Dipylidium caninum

dog lice

Mallophaga chewing lice- Ischnocera- DTF, Amblycera- MM

33
Q

how to control lice

A

flea control usually controls lice

do not have to treat environment because life cycle occurs on host

34
Q

lice are small, wingless, — flattened ectoparasites
with legs modified for clinging to hair or feathers

A

dorsoventrally

35
Q

lice are vet importance because

A

annoyance and blood loss as well as ability to act as
vectors and intermediate hosts of pathogens and parasites.

36
Q

two general categories of lice

A

Anoplura- sucking lice- HLSPP

Mallophaga chewing lice- Ischnocera- DTF, Amblycera- MM

37
Q

lice eggs are called

A

nits
attached to host hair

38
Q

Mallophaga Antennae may be recessed into grooves (suborder —) or
projecting out from head (—).

A

Amblycera- MM

Ischnocera- DTF

39
Q

life cycle of lice

A

heterometabolous
egg- nymph- adult

all on host

40
Q

lice leave host when

A

only when body temperature fluctuates drastically due either to death or high fever.

transmission is generally by contact.

41
Q

lice or fleas are generally host specific

A

lice

42
Q

Crab louse, primarily found in pubic and other coarse body hair. Transmitted by close physical contact

A

Pthirus pubis

Anoplura- sucking lice- HLSPP

43
Q

Human head louse; found chiefly on the head
with eggs glued to hair shafts. Readily transmitted by contact or on articles such as combs brushes or cap

A

Pediculus humanus capitis

Anoplura- sucking lice- HLSPP

44
Q

Human body louse. Egg, nymph and adult
stages found primarily in seams of clothing. Body lice are important as pests and as disease vectors.

A

Pediculus humanus humanus

Anoplura- sucking lice- HLSPP

45
Q

antennae recessed into grooves. Four segmented maxillary
palpi. Cause blood to flow from skin of host by rasping action of mandibles.

A

Amblycera

Mallophaga chewing lice- Ischnocera- DTF, Amblycera- MM

46
Q

antennae extended laterally from head.

A

Ischnocera

Mallophaga chewing lice- Ischnocera- DTF, Amblycera- MM

47
Q

Trichocectes canis, the chewing louse of dogs may ingest eggs of —. Cystercercoids develop within the louse and may be ingested by the host in grooming.

A

Dipylidium caninum

doubled pored dog tapeworm

Fall 22: Parasites (32 decks)

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