Lecture 6: Louse Infestations Flashcards
lice: order
phthiraptera
lice: characteristics (4)
wingless
dorsoventrally flattened
obligate ectoparasites of birds and mammals
host specific = completes life cycle on host
pediculosis
infestation with lice
nits are
lice eggs
lice: life cycle and transmission
eggs/nits attached to hairs or feathers of host
hemimetabolous/incomplete metamorphosis with 3 nymphal instars
direct contact transmssion
2 main groups of lice
anoplura = sucking lice
mallophaga = chewing/biting lice
anoplura/sucking lice: infest what, feed on, slow vs fast moving, head size vs prothorax, mouthparts
mammals
blood
slow
head narrower than prothorax
protrusible piercing mouthparts
mallophaga/chewing lice: infest what, feed on, slow vs fast moving, head size vs prothorax, mouthparts
birds and mammals
feathers, epidermal scales, sebum
rapidly
head broader than prothorax
mandibulate mouthparts
severe pediculosis: clinical importance
alopecia, production losses, anemia
pediculosis: diagnosis
mouthparts of sucking lice embedded in skin
taxonomic ID - louse in saline, glyercin or mineral oil on slide
louse infestation: treatment
insecticides
antiparasitic drugs = ivermectin
menacanthus stramineus: generic name, hosts, predilection
chicken body louse
chickens and turkeys
skin, sparsely feathered vent
menopan gallinae: generic name, predilection site
shaft louse
breast and thighs
specie of sucking louse in dogs
linognathus setosus
linognathus setosus: hosts, predilection, effect of heavy infestations
canids
head, neck and shoulder (under collar)
anemia
most common chewing louse in dogs
trichodectes canis
which chewing louse is intermediate host of tapeworm Dipylidium caninum
trichodectes canis
felicola subrostratus: generic name, species, predilection site
cat chewing louse
face, back, pinnae
what diseases can be transmitted by sucking lice of cattle (3)
bovine anaplasmosis
ringworm
theileriasis
4 species of cattle sucking lice
linoghanthus vituli
haematopinus eurysternus
solenopotes capillatus
haematopinus quadripertusus
linognathus vituli: generic name, predilection
longnosed cattle louse
skin of head, neck, dewlap
haematopinus eurysternus: generic name, predilection
shortnosed cattle louse
head = horns, eyes and ears
solenopotes capillatus: generic name
little blue cattle louse
what is the smallest of the sucking lice that infests cattle
solenopotes capillatus = little blue cattle louse
haematopinus quadripertusus: generic name, predilection, when most abundant/region found
cattle tail louse
tropics and subtropics, summer
tail and perineum
cattle chewing louse: scientific name
damalinia (bovicola) bovis
which cattle louse is capable of parthenogenesis
damalinia bovis
what season do lice infestations of sheep and goats increase
cold weather
sheep chewing louse: scientific name, predilection, effect of infestation
damalinia (bovicola) ovis
back, neck, shoulders (roams in wool)
louse worry = reduces quantity and quality of wool produced
anoplura of sheep and goats (4)
Linognathus ovillus
Linognathus pedalis
Linognathus africanus
Linognathus stenopsis
sheep face louse: scientific name, predilection, vector for what disease
linognathus ovillus
face
mycoplasma ovis
sheet foot louse: scientific name, predilection, how long can survive off host (how transmission occurs)
linognathus pedalis
feet, legs, belly (NO WOOL)
1 week –> pasture and housing
african blue louse: scientific name, climates, predilection, what species experience infestations
linognathus africanus
tropical areas
back and ribs
deer, wild ruminants
goat sucking louse: scientific name, what breads affected
linognathus stenopsis
short haired and angora breeds
mallophaga of goats caused by what genera
damalina (bovicola) species
how lice of equids transmitted
grooming equipment, blankets, tack
are any pathogens transmitted by lice of equids
no
damalinia (boviola) equi: generic name, predilection, how does coat thickness affect number of lice
horse chewing louse
neck, flanks, tail base
winter coat most dense
haematopinus asini: generic name, predilection
horse sucking louse
coarse hair = fetlock, mane, tail base, forelock
one species of swine louse
haematopinus suis
haematopinus suis: generic name, predilection, vector of what virus
hog louse
thin skin = neck, flank, inner leg, ears
swine pox virus
