lice Flashcards
lice
lice characteristics
insect (class), species-specific, worldwide distributed, infections known as pediculoses, on host almost entire life, only leaving it to infect host of the same species + many species prefer defined regions of the host’s body
characteristics anoplura (sucking lice)
quite large (un to 5mm length), ehad smaller then thorax, move slowly and only infect mammals, mouth shaped to pierce and suck, legs with robust claws to hold on the host
mallophaga (chewing lice) characteristics
mainly infect birds, feed on fur, feather, debris from epidermis, skin secretions or blood, flat body, head larger than thorax, mouth shaped to chew, legs with robust claws to holt on the host
life cycle of lice
3 developmental stages: eggs (oval, ~1mm in length, 3 immature nymphs, adults)
cat lice: name + characteristics
Felicola subrostratus, chewing louse, pointy, triangular head, localises on face, ears and neck, life cycle completes within 30-40 days
dog lice: Heterodoxus spiniger: characteristics
Heterodoxus spiniger: chewing louse, large (5mm), slender and yellowish in colour, body covered with long and thick setae, 2 claws at the end of each leg, localises on the whole body surface
dog lice: Linognathus setosus: characteristics
sucking louse of dog and other canids, body length 2 mm after blood meal, 3rd pair of legs larger than the first 2, life cycle complete within 20-40 days, likely vector of Acanthocheilonema reconditum
dog lice: trichodectes canis: characteristics
chewing louse of dogs and other canids, small (1-2 mm), flattened and yellowish in colour with darker areas, head wider than long, life cycle completes within 30-40 days, localises on head/neck/tail and causes intense irritation, vector/intermediate host of Dipylidium caninum
lice of small ruminants: Bovicola ovis: type of louse
chewing louse, also known as Damalinia ovis
lice of small ruminants: Bovicola ovis: physical features (colour, length, head)
red-brownish, 3mm long, head as wide as long and mouth located ventrally
lice of small ruminants: Bovicola ovis: life cycle
completes within 15-20 days
lice of small ruminants: Bovicola ovis: where does it localise?
localises on shoulders and back, causes intense irritation
lice of small ruminants: Bovicola caprae & Bovicola limbata: type of lice
chewing lice
lice of small ruminants: Bovicola caprae & Bovicola limbata: physical features (colour, size, head)
red-brownish, 3mm long, head as wide as long, mouth located ventrally
lice of small ruminants: Bovicola caprae & Bovicola limbata: life cycle
15-20 days
lice of small ruminants: Bovicola caprae & Bovicola limbata: where does it localise?
shoulders and back, causes intense irritation
Lice of small ruminants: Linognathus pedalis: type of lice
sucking louse
Lice of small ruminants: Linognathus pedalis: physical features (colour, size, head)
blackish, 2.5mm long, second and third pair of legs larger than first
Lice of small ruminants: Linognathus pedalis: life cycle
completes within 20-40 days
Lice of small ruminants: Linognathus pedalis: where does it localise
legs and abdomen
Lice of small ruminants: Linognathus pedalis: what is special about it?
only species able to survive off host for up to 1 week
Bovine lice: Bovicola bovis: type of louse
chewing louse, also known as Damalinia bovis
Bovine lice: Bovicola bovis: physical features
red-brownish with dark stripe son the abdomen, 2mm long, head as wide as long and rounded anteriorly
Bovine lice: Bovicola bovis: life cycle
completes within 15-20 days, can reproduce by parthenogenesis
Bovine lice: Bovicola bovis: where does it localise:
head, neck, shoulders, back and base of the tail, causes intense irritation
Bovine lice: Haematopinus eurysternus: type of louse
sucking louse
Bovine lice: Haematopinus eurysternus: physical features
yellow-brownish, with dark stripes on side of abdomen, 3.4-4.8mm long, head pointy and short, small claws
Bovine lice: Haematopinus eurysternus: life cycle
20-30 days
Bovine lice: Haematopinus eurysternus: localisation
head and bases of horns and tail
Bovine lice: Haematopinus quadripertusus: type of louse
Sucking louse known as tail louse
Bovine lice: Haematopinus quadripertusus: physical features
dark with obvious sternal plaques, 4-5mm long, legs of equal length, with robust hooks
Bovine lice: Haematopinus quadripertusus: life cycle
20-30 days
Bovine lice: Haematopinus quadripertusus: where does it localise
head and bases of horns and tails
