Lecture 5: Flies and Myiasis Flashcards
diptera are
flies
diptera/flies characteristics: morphology, type of life cycle
1 pair of wings
1 pair of halteres = modified hindwings
complete/holometabolous metamorphosis = egg –> larvae –> pupa –> adult
diptera/flies: 3 main suborders
nematocera
brachycera
cyclorrhapha
what do all 3 suborders of diptera have in common
hematophagous
biting mouthparts
mosquitos, blackflies and midges are part of what suborder of diptera
nemaotcera
horseflies and deerflies are part of what suborder of diptera
brachycera
blowflies, botflies and face flies are part of what suborder of diptera
cyclorrhapha
myiasis definition
when larvae feed on host animal tissues
which diptera suborder includes myiasis species
cyclorrhapha
clinical importance of biting flies
inflammation –> pruritis –> scratching, rubbing,, biting –> alopecia, secondary bacterial infections, production losses
2 main effects of myiasis
tissue destruction
obstruction - respiratory passages, GI tract
diagnosis: detection of (4)
adults on/near host
larvae on/near host
larvae expelled in feces or from nose
eggs on host
how to preserve flies for taxonomic ID
70% ethanol
comprehensive control program targets (3)
reduce host exposure to adult flies + eliminate larvae/eggs on host
control existing environmental infestation of all life cycle stages
prevent re infection of host and/or environment
treatment and prevention of adult flies (4)
insecticides
oral insect growth regulators to disrupt life cycle
repellants, fly masks
shelter animals during peak hours of fly activity + prevent exposure to fly infested habitats
treatment and prevention of myiasis (3)
insecticides
macrocyclic lactones (ivermectin)
physical removal from host, clean wounds
environmental control: chemical control (3)
insecticides
insect growth regulators for larvae
smothering agents for mosquito larvae and pupae
environmental control: biological control (2)
parasitoid wasps feed on pupae of cyclorrhaphans
bacillus thuringiensis feed on larval stages
environmental control: source reduction
modify aquatic habitats of mosquito larvae
nematocera: 3 main genera of mosquitos
aedes
anopheles
culex
nematocera: main genus for blackflies
simulium
equine allergic dermatitis caused by (hint: nematocera)
culicoides midges
pathogens transmitted by nematocera mosquitos (3)
canine heartworm
plasmodium/malaria
WNE/EE
simulium blackflies feed on
blood of birds and mammals
aedes/anopheles/culex mosquitos feed on
mammals, birds, reptiles, amphibians
parasitic protozoa species that use simulium blackflies to transmit disease (and what species are affected)
leucocytozooon species - poultry and birds
simuliotoxicosis: what caused by, affected species, effect
simulium blackflies
equids, ruminants, swine
anaphylactic shock
nematocera midges: genus, host targets
culicoides species
mammals and birds
what 2 parasites are associated with leucocytozoon species
simulium blackflies
culicoides midges
nematocera sandflies: genera (2)
lutzomyia
phlebotomus
new world vs old world sandlfies
lutzomyia = new world
phlebotomus = old world
sandflies: target species (3)
mammals
birds
reptiles
pathogen transmitted by sandflies
leishmania species
clinical leishmaniasis found in what 2 species
humans
dogs
types of flies found in nematocera (4)
mosquitos
blackflies
midges
sandflies
2 main flies in brachycera
horseflies
deerflies
genus: horseflies
tabanus
genus: deerflies
chrysops
pathogen transmitted by brachycera species (horseflies, deerflies)
trypanosoma species of ungulates
which suborder of flies are biting flies
cyclorrhapha
4 types of BITING flies within cyclorrhapha
horn flies
stable flies
keds/louse flies
tsetse flies
3 main groups of cyclorrhapha flies (hint: behavior)
biting
non biting
myiasis causing
horn flies genus
haematobia species
stable flies genus
stomoxys species
melophagus ovinus: type of fly
sheep ked fly
biting
tsetse flies: genus
glossina species
cyclorrhapha non biting flies (2)
face fly
housefly
face fly genus
musca autumnalis
pathogen transmitted by face fly
moraxella bovis
housefly genus
musca domestica
obligate myiasis
larvae require live host for food
facultative myiasis
larvae eat carrion and sometimes infest live animals
cyclorrhapha: myiasis causing flies (3)
flesh flies
blowflies
botflies
which families of cyclorrhapha includes BOTH facultative and obligate myiasis causing species
flesh flies
blowflies
obligate myiasis causing flies in cyclorrhapha: generic name and binomial
gray flesh fly = wohlfahrtia vigil
new world screwworm = cochliomyia hominivorax
new world screwworm outbreak: where, date
2016
Key deer, FL
common green bottle fly: scientific name
lucilia sericata
lucilia sericata: generic name, what kind of myiasis, treatment
common green bottle fly
facultative myiasis
maggot debridement therapy
botflies are agents of what kind of myiasis
obligate
main types of botflies (3)
sheep nasal botfly
heel flies
horse botflies
sheep nasal botfly: scientific name
oestrus ovis
false gid is caused by what species of botfly
oestrus ovis = sheep nasal botfly
heel flies: genus, what it causes in host
hypoderma species
SQ cysts (warbles) in bovids
horse botflies: genus, what it causes in host
gaterophilus species
GI myiasis in equids
cuterebra species: type of fly, what it causes in hosts, main complication in dogs and cats
Botfly
SQ cysts in rabbits/rodents
cerebrospinal cuterebriasis