L5: Flies & Myiasis (MOST UTD) Flashcards
what does oviparous mean
flies lay eggs
what does ovoviparious mean
flies release larvae
what does hematophagous mean
flies feed on blood
what is myiasis
larval stage of fly feeds on host tissues
consequences of biting flies
- disrupt normal behavior
- inflammatory response to bites leads to further disruptive behaviors
- pruritis, dermatitis, scratching, biting etc
- transmit pathogens
how do non-biting flies irritate/damage the mucous membranes of their hosts
spines on their mouthpart
consquences of non-biting flies
- transmit pathogens
- myiasis can cause: tissue destruction, secondary bacterial infections and obstruction of respiratory / GI tracts
what are the 3 important genus of mosquitoes to know
- Aedes
- Anopheles
- Culex
what are two important pathogens transmitted by mosquitoes
- Canine heartworm
- plasmodium - malaria
this fly causes simuliotoxicosis
Black flies
toxins build up in animals bitten by LOTS of black flies, causes them to go into shock and die
what are the 2 important species of black flies (Simuliidae)
- Leucocytozoon spp. (devastating to birds, esp poultry)
- Simulium - feed on blood of birds/mammals
Musca autumnalis
face fly
feed on ocular/nasal discharge of livestock
Musca domestica
- housefly
- most abundant insect pest associated w/ livestock, poultry and people
- feed on ocular/nasal discharge and other bodily fluids
important species of Midges
Culicoides spp.
biters of mammals and birds
important parasite transmitted by midges
Leucocytozoon
what fly causes equine allergic dermatitis
Midges (Culicoides spp)
2 important species of Sandflies
- Lutzomyia (new world)
- Phlebotomus (old world)
pathogen carried by Sandflies
Leishmania spp.
Tabanus
horseflies
Chrysops
deerflies
pathogen carries by Horseflies (Tabanus) & Deerflies (Chrysops)
Trypanosoma spp
has large impact on hoofstock
Haematobia spp
horn flies
where do Haematobia spp. (hornflies) live in relation to their host
live on cattle
Stomoxys spp.
Stable flies
where do Stomoxys spp. (stable flies) live in relation to their host
on the legs
Hippoboscidae
keds or louse flies
Melophagus ovinus
Sheep ked
wingless, spend their entire life cycle on the host
Glossinidae
tsetes flies
(Glossina spp.)
Tsetes flies (Glossinidae) are vectors of what pathogen?
Trypanosoma bruceri
* causes nagara in domestic animals
* causes sleeping sickness in humans
obligae myiasis
larvae require a live host for food
facultative myiasis
larvae eat dead flesh (carrion) or sometimes infest a live animal
Wohlfahrita vigil
gray flesh fly
-obligate myiasis
what type of myiasis do Wohlfahrita vigil exhibit
(gray flesh flies)
obligate myiasis
two important species of Blowflies
- Cochliomyia hominivorax (new world screwworm) : obligae myiasis
- Lucilia sericata (common green bottle fly): facultative myiasis
Cochliomyia hominivorax
new world screwworm
type of blowfly
what type of myiasis do cochliomyia hominivorax exhibit
obligate
(new world screwworm)
what type of myiasis do Lucilia sericata exhibit
facultative
(Common green bottle fly)
Oestridae
botflies
what type of myiasis do Oestridae (botflies) exhibit
oestridae = botflies
obligate myiasis
adults don’t feed
Oestrus ovis
Sheep nasal botfly
Hypoderma spp.
Heel flies
Gasterophilus spp.
Horse botlfies
cause GI myiasis
Cuterebra spp.
botflies of rabbits and rodents
consequences of Cuterebra spp. in dogs and cats
complications caused by wandering alrvae
- myiasis of eye, nasal, oral regions
- cerebrospinal cuterebriasis (potentially fatal)
normal hosts are rabbits and rodents
fly that can cause cerebrospinal cuterebriasis in dogs/cats
Cuterebra spp. of botflies
