Canine/Feline- Insects: Cuterebra spp. and lice Flashcards
Examples of Insects
Cuterebra spp. Culicidae Lice Fleas Reduviidae and Cimicidae
Insect characteristics
3 pairs of legs
A head
Distinct thorax and abdomen
Pair of antennae
What is the Importance of flies in veterinary
parasitology?
Biological transmission of organisms (eg intermediate hosts of nematodes, protozoa, etc)
Mechanical transmission of organisms
Fly strike
Important to veterinary medicine
Family Oestridae Larvae characteristics
obligatory parasites
host specific
(Cuterebra, Hypoderma and Oestrus)
Family Oestridae Adults characteristics
large hairy flies
nonfunctional mouthparts
short-lived
What are Cuterebra spp.Common name?
Rodent or rabbit bot fly, New World skin bot flies.
What are Cuterebra spp.hosts?
Rodents, rabbits, squirrels, chipmunks, mice,
dogs, cats.
Zoonosis
What is Cuterebra spp. Identification?
Third stage larva and season
3rd stage larva is dark brown and covered with black spines
What is Cuterebra spp.Site(s) of infection
Subcutaneous connective tissue, can locate in
nasal and oral regions and migrate to brain
What is Cuterebra spp. Pathogenesis and lesions?
Fibrotic cyst forms from larva in subcutaneous tissue. Larva in brain of cat can lead to
infarction
What is Cuterebra spp. Clinical signs?
Lump in neck, fur constantly wet, hole drips fluid
What is Cuterebra spp. Diagnosis?
Larva can be removed whole from breathing hole
Type 1 hypersensitivity type reaction
Wound heals slowly
What is Cuterebra spp. Treatment and prevention?
Several remedies may protect, but are not approved.
What is Culicidae.Common name?
Mosquitoes
What is Culicidae Identification?
Pair of wings
long thin legs
long proboscis
long antennae
What is Culicidae Pathogenesis and lesions
Transmit many diseases and pathogens
What is Suborder Ischnocera (Mallophaga) characteristics?
Biting, chewing lice
Wide mandible mouthparts
Feed on skin, hair, feathers, other organic material
3 mm, yellow
Rapid movement to move over skin and covering
Often bird lice
What is Trichodectes canis common name?
Dog biting louse or canine chewing louse
What is Trichodectes canis hosts?
Dogs
What is Trichodectes canis Identification?
Yellowish color,
biting/chewing mouthparts,
active louse,
adults 2 mm
What is Trichodectes canis life cycle?
Female lays eggs, develop to nymphs and adults.
Require host to complete life cycle
What is Trichodectes canis site(s) of infection?
Hair, Skin
What is Trichodectes canis Pathogenesis and lesions?
Vector of D. caninum.
Heavy infestations in neglected and underfed animals.
Affects young
What is Trichodectes canis susceptible breed?
spaniels
What is Trichodectes canis Clinical signs?
Pruritus.
Dogs scratch, cause loss of hair.
Restless and scratch continuously.
Anemia can occur
What is Trichodectes canis Diagnosis?
Identification of louse
What is Trichodectes canis Treatment and prevention
Avoid direct contact with brushes, combs and blankets
Recent products include MCL
What is Suborder Anoplura characteristics?
Bloodsucking lice more pathogenic Pointed “noses” Large, 3-5 mm Dark blue, depending on amount blood ingested Slow moving Clasping hair shaft Lice of mammals
What is Linognathus setosus Host?
Dogs
What is Linognathus setosus Identification?
3-5 mm, head narrower than thorax, sucking mouthparts
What is Linognathus setosus Life Cycle?
Similar to Trichodectes canis
Female lays eggs, develop to nymphs and adults.
Require host to complete life cycle
What is Linognathus setosus Site(s) of infection
Skin
What is Linognathus setosus Pathogenesis and lesions?
Heavy infestation can cause severe anemia
What is Linognathus setosus Clinical signs?
Loss of body
condition and damage to skin
What is Linognathus setosus Diagnosis?
Louse identification
What is Linognathus setosus Treatment and prevention?
Avoid direct contact with brushes, combs and blankets
Recent products include MCL
What is Linognathus setosus Common Name?
Dog sucking louse
