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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
lice
ambylcera antennae are recessed into grooves in the head Mallophaga chewing lice- Ischnocera- DTF, Amblycera- MM
26
MENACANTHUS STRAMINEUS infect
found in thigh, breast and vent of birds antennae are recessed Mallophaga chewing lice- Ischnocera- DTF, Amblycera- MM
27
found in feather shaft of chicken
Menopon gallinae Mallophaga chewing lice- Ischnocera- DTF, Amblycera- MM
28
feather shaft lice of chickens
Menopon gallinae Mallophaga chewing lice- Ischnocera- DTF, Amblycera- MM
29
found on cattle
Damalinia bovis live on top of head, shoulders, neck, back and rump leads to alopecia Mallophaga chewing lice- Ischnocera- DTF, Amblycera- MM
30
Damalinia bovis feed on
feed on hair shafts, dermal scales and blood scabs lice of cattle Mallophaga chewing lice- Ischnocera- DTF, Amblycera- MM
31
dog lice
Trichodectes canis Transmits Dipylidium caninum Mallophaga chewing lice- Ischnocera- DTF, Amblycera- MM
32
Trichodected canis transmit
Dipylidium caninum dog lice Mallophaga chewing lice- Ischnocera- DTF, Amblycera- MM
33
how to control lice
flea control usually controls lice do not have to treat environment because life cycle occurs on host
34
lice are small, wingless, --- flattened ectoparasites with legs modified for clinging to hair or feathers
dorsoventrally
35
lice are vet importance because
annoyance and blood loss as well as ability to act as vectors and intermediate hosts of pathogens and parasites.
36
two general categories of lice
Anoplura- sucking lice- HLSPP Mallophaga chewing lice- Ischnocera- DTF, Amblycera- MM
37
lice eggs are called
nits attached to host hair
38
Mallophaga Antennae may be recessed into grooves (suborder ---) or projecting out from head (---).
Amblycera- MM Ischnocera- DTF
39
life cycle of lice
heterometabolous egg- nymph- adult all on host
40
lice leave host when
only when body temperature fluctuates drastically due either to death or high fever. transmission is generally by contact.
41
lice or fleas are generally host specific
lice
42
Crab louse, primarily found in pubic and other coarse body hair. Transmitted by close physical contact
Pthirus pubis Anoplura- sucking lice- HLSPP
43
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
Pediculus humanus capitis Anoplura- sucking lice- HLSPP
44
Human body louse. Egg, nymph and adult stages found primarily in seams of clothing. Body lice are important as pests and as disease vectors.
Pediculus humanus humanus Anoplura- sucking lice- HLSPP
45
antennae recessed into grooves. Four segmented maxillary palpi. Cause blood to flow from skin of host by rasping action of mandibles.
Amblycera Mallophaga chewing lice- Ischnocera- DTF, Amblycera- MM
46
antennae extended laterally from head.
Ischnocera Mallophaga chewing lice- Ischnocera- DTF, Amblycera- MM
47
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.
Dipylidium caninum doubled pored dog tapeworm

Fall 22: Parasites (32 decks)

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