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Parasitology > Lecture 6: Louse Infestations > Flashcards

Lecture 6: Louse Infestations Flashcards

1
Q

lice: order

A

phthiraptera

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2
Q

lice: characteristics (4)

A

wingless
dorsoventrally flattened
obligate ectoparasites of birds and mammals
host specific = completes life cycle on host

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3
Q

pediculosis

A

infestation with lice

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4
Q

nits are

A

lice eggs

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5
Q

lice: life cycle and transmission

A

eggs/nits attached to hairs or feathers of host
hemimetabolous/incomplete metamorphosis with 3 nymphal instars
direct contact transmssion

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6
Q

2 main groups of lice

A

anoplura = sucking lice
mallophaga = chewing/biting lice

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7
Q

anoplura/sucking lice: infest what, feed on, slow vs fast moving, head size vs prothorax, mouthparts

A

mammals
blood
slow
head narrower than prothorax
protrusible piercing mouthparts

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8
Q

mallophaga/chewing lice: infest what, feed on, slow vs fast moving, head size vs prothorax, mouthparts

A

birds and mammals
feathers, epidermal scales, sebum
rapidly
head broader than prothorax
mandibulate mouthparts

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9
Q

severe pediculosis: clinical importance

A

alopecia, production losses, anemia

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10
Q

pediculosis: diagnosis

A

mouthparts of sucking lice embedded in skin
taxonomic ID - louse in saline, glyercin or mineral oil on slide

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11
Q

louse infestation: treatment

A

insecticides
antiparasitic drugs = ivermectin

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12
Q

menacanthus stramineus: generic name, hosts, predilection

A

chicken body louse
chickens and turkeys
skin, sparsely feathered vent

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13
Q

menopan gallinae: generic name, predilection site

A

shaft louse
breast and thighs

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14
Q

specie of sucking louse in dogs

A

linognathus setosus

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15
Q

linognathus setosus: hosts, predilection, effect of heavy infestations

A

canids
head, neck and shoulder (under collar)
anemia

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16
Q

most common chewing louse in dogs

A

trichodectes canis

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17
Q

which chewing louse is intermediate host of tapeworm Dipylidium caninum

A

trichodectes canis

18
Q

felicola subrostratus: generic name, species, predilection site

A

cat chewing louse
face, back, pinnae

19
Q

what diseases can be transmitted by sucking lice of cattle (3)

A

bovine anaplasmosis
ringworm
theileriasis

20
Q

4 species of cattle sucking lice

A

linoghanthus vituli
haematopinus eurysternus
solenopotes capillatus
haematopinus quadripertusus

21
Q

linognathus vituli: generic name, predilection

A

longnosed cattle louse
skin of head, neck, dewlap

22
Q

haematopinus eurysternus: generic name, predilection

A

shortnosed cattle louse
head = horns, eyes and ears

23
Q

solenopotes capillatus: generic name

A

little blue cattle louse

24
Q

what is the smallest of the sucking lice that infests cattle

A

solenopotes capillatus = little blue cattle louse

25
Q

haematopinus quadripertusus: generic name, predilection, when most abundant/region found

A

cattle tail louse
tropics and subtropics, summer
tail and perineum

26
Q

cattle chewing louse: scientific name

A

damalinia (bovicola) bovis

27
Q

which cattle louse is capable of parthenogenesis

A

damalinia bovis

28
Q

what season do lice infestations of sheep and goats increase

A

cold weather

29
Q

sheep chewing louse: scientific name, predilection, effect of infestation

A

damalinia (bovicola) ovis
back, neck, shoulders (roams in wool)
louse worry = reduces quantity and quality of wool produced

30
Q

anoplura of sheep and goats (4)

A

Linognathus ovillus
Linognathus pedalis
Linognathus africanus
Linognathus stenopsis

31
Q

sheep face louse: scientific name, predilection, vector for what disease

A

linognathus ovillus
face
mycoplasma ovis

32
Q

sheet foot louse: scientific name, predilection, how long can survive off host (how transmission occurs)

A

linognathus pedalis
feet, legs, belly (NO WOOL)
1 week –> pasture and housing

33
Q

african blue louse: scientific name, climates, predilection, what species experience infestations

A

linognathus africanus
tropical areas
back and ribs
deer, wild ruminants

34
Q

goat sucking louse: scientific name, what breads affected

A

linognathus stenopsis
short haired and angora breeds

35
Q

mallophaga of goats caused by what genera

A

damalina (bovicola) species

36
Q

how lice of equids transmitted

A

grooming equipment, blankets, tack

37
Q

are any pathogens transmitted by lice of equids

A

no

38
Q

damalinia (boviola) equi: generic name, predilection, how does coat thickness affect number of lice

A

horse chewing louse
neck, flanks, tail base
winter coat most dense

39
Q

haematopinus asini: generic name, predilection

A

horse sucking louse
coarse hair = fetlock, mane, tail base, forelock

40
Q

one species of swine louse

A

haematopinus suis

41
Q

haematopinus suis: generic name, predilection, vector of what virus

A

hog louse
thin skin = neck, flank, inner leg, ears
swine pox virus

Parasitology (10 decks)

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