Fleas and Lice Flashcards
What type of metamorphosis do fleas undergo?
Holometabolous
- complete metamorphosis
- Egg - larva - pupa - adult
Dipylidium caninum
Canine tapeworm. Fleas are intermediate hosts for this
Life cycle of a flea
Egg ->molts twice as a larvae (susceptible to desiccation), pupate (becomes a pupa in the cacoon), Pre-emerged adults remain withint he cacoon waiting for a food source.
- Blood meal
The cat flea
ctenocephalides felis felis
Where are most newly acquired infections from an infected environment (fleas)
infected invironment more often than an infected host.
What is the reaction an animal can have to Ctenocephalides felis felis
flea bite dermatitis - a hypersensitivity reaction to the antigens in the flea saliva
Treatment for Ctenocephalides felis felis
Isoxazolines- GABA gated and glutamate gated chloride channel antagonist.
Insect growth regulators.
Borates- kills only feeding immature stages (larval stages)
The dog flea
Ctenocephalides canis
stick-tight flea
Echidnophaga gallinacea
what species is the Echidnophaga gallinacea important for
Domestic poultry- aggregate on the bare areas of the had, comb or wattles. Larvae end up in chicken manure and feed
Jigger
Tunga penetrans
-eggs are retained in the abdomen and the flea swells to the size of a pea
Oriental rat flea
Xenophysalla cheopis
- Capeable of transmitting Yersinia pestis
Ground squirrel flea
Oropsylla monatna
- capeable of transmitting Yersinia pestis
Chewing/biting lice
Mallophaga
- has mandibulate mouthparts for chewing
Sucking lice
Anoplura
- have piercign mouthparts
What are nits?
nits are eggs that are securely cemented to the shaft of hairs or feathers of the host
Do lice have complete or incomplete metamorphosis?
incomplete metamorphosis
they are hemimetabolous
egg- larva- nymph- adult
Chicken body louse (mellophaga class)
Menacanthus stramineus
Cat louse
Felicola subrostratus
Lice of domestic dogs
Trichodectes canis
Lice that infects herbivores and different species for different hosts (Mallophaga)
Damalinia sp.
Sucking lice of swine
Haematopinus suis
Long nosed cattle louse
Linognathus vituli
Treatment and control of lice
Pyrethrins work well for sucking lice
Pour on formulations better for chewing lice
- Must treat 2x to kill the next generation.
