Lecture 6: Louse Infestations

Question 1

lice: order

Answer 1

phthiraptera

Question 2

lice: characteristics (4)

Answer 2

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

Question 3

pediculosis

Answer 3

infestation with lice

Question 4

nits are

Answer 4

lice eggs

Question 5

lice: life cycle and transmission

Answer 5

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

Question 6

2 main groups of lice

Answer 6

anoplura = sucking lice
mallophaga = chewing/biting lice

Question 7

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

Answer 7

mammals
blood
slow
head narrower than prothorax
protrusible piercing mouthparts

Question 8

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

Answer 8

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

Question 9

severe pediculosis: clinical importance

Answer 9

alopecia, production losses, anemia

Question 10

pediculosis: diagnosis

Answer 10

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

Question 11

louse infestation: treatment

Answer 11

insecticides
antiparasitic drugs = ivermectin

Question 12

menacanthus stramineus: generic name, hosts, predilection

Answer 12

chicken body louse
chickens and turkeys
skin, sparsely feathered vent

Question 13

menopan gallinae: generic name, predilection site

Answer 13

shaft louse
breast and thighs

Question 14

specie of sucking louse in dogs

Answer 14

linognathus setosus

Question 15

linognathus setosus: hosts, predilection, effect of heavy infestations

Answer 15

canids
head, neck and shoulder (under collar)
anemia

Question 16

most common chewing louse in dogs

Answer 16

trichodectes canis

Question 17

which chewing louse is intermediate host of tapeworm Dipylidium caninum

Answer 17

trichodectes canis

Question 18

felicola subrostratus: generic name, species, predilection site

Answer 18

cat chewing louse
face, back, pinnae

Question 19

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

Answer 19

bovine anaplasmosis
ringworm
theileriasis

Question 20

4 species of cattle sucking lice

Answer 20

linoghanthus vituli
haematopinus eurysternus
solenopotes capillatus
haematopinus quadripertusus

Question 21

linognathus vituli: generic name, predilection

Answer 21

longnosed cattle louse
skin of head, neck, dewlap

Question 22

haematopinus eurysternus: generic name, predilection

Answer 22

shortnosed cattle louse
head = horns, eyes and ears

Question 23

solenopotes capillatus: generic name

Answer 23

little blue cattle louse

Question 24

what is the smallest of the sucking lice that infests cattle

Answer 24

solenopotes capillatus = little blue cattle louse

Question 25

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

Answer 25

cattle tail louse tropics and subtropics, summer tail and perineum

Question 26

cattle chewing louse: scientific name

Answer 26

damalinia (bovicola) bovis

Question 27

which cattle louse is capable of parthenogenesis

Answer 27

damalinia bovis

Question 28

what season do lice infestations of sheep and goats increase

Answer 28

cold weather

Question 29

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

Answer 29

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

Question 30

anoplura of sheep and goats (4)

Answer 30

Linognathus ovillus Linognathus pedalis Linognathus africanus Linognathus stenopsis

Question 31

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

Answer 31

linognathus ovillus face mycoplasma ovis

Question 32

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

Answer 32

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

Question 33

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

Answer 33

linognathus africanus tropical areas back and ribs deer, wild ruminants

Question 34

goat sucking louse: scientific name, what breads affected

Answer 34

linognathus stenopsis short haired and angora breeds

Question 35

mallophaga of goats caused by what genera

Answer 35

damalina (bovicola) species

Question 36

how lice of equids transmitted

Answer 36

grooming equipment, blankets, tack

Question 37

are any pathogens transmitted by lice of equids

Answer 37

no

Question 38

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

Answer 38

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

Question 39

haematopinus asini: generic name, predilection

Answer 39

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

Question 40

one species of swine louse

Answer 40

haematopinus suis

Question 41

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

Answer 41

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