Flies and Myiasis Flashcards
what is another name for flies?
diptera
how many pairs of wings do adult flies have?
1 pair
do all flies have wings?
absent in some parasitic flies
what do adults of all Diptera spp. have?
1 pair of Haltere
what are haltere?
modified hindwings
what is the arrow pointing to?
what are the 3 main groups of Diptera/flies?
Nematocera
Brachycera
Cyclorrhapha
what do all 3 of the main groups of Diptera have?
biting mouthparts, all hematophagous species
what type of metamorphosis do flies have?
holometabolous
egg -> larva -> pupa -> adult
define myiasis
infection with fly larvae
what group of flies have larvae that feed on host animal tissues?
cyclorrhaphans
what is the clinical importance of biting flies? (what do they do to the host)
-painful/irritating bites disrupt normal behaviors
-inflammation -> pruritis & dermatitis ->scratching, rubbing, biting
-sometimes severe blood loss
-pathogens transmitted
what is the clinical importance of non-biting flies? (what do they do to the host)
-annoy animals and disrupt normal behavior
-spines on mouth parts irritate/damage mucuous membranes
-transmission of pathogens
what is the clinical importance of myiasis? (what do they do to the host)
-tissue destruction: mild to severe to fatal
-obstruction: respiratory passages, GI tract
where can you find flies on or expelled from the host?
adults/on near host
larvae on/in host
larvae expelled in feces (horse bots) or from nose (nasal bots)
eggs on host (botflies)
How do you get the taxonomic ID of flies?
preserve in 70% ethanol - adults, larvae, and eggs of common species can be identified using pictorial keys
what does a comprehensive control program do?
-reduce host exposure to adult flies - eliminate eggs/larvae on or in hosts
-control existing environmental infestation (all life cycle stage)
-prevent subsequent re-infestations of host and/or environment
what is the treatment and prevention of adult flies?
-insecticides
-oral insect growth regulators -> disrupt life cycle
-repellants, fly masks, smudge pots, etc.
-shelter animals during peak hours of fly activity and limit their exposure to fly-infested habitats
what is the treatment and prevention of myiasis?
-insecticides
-macrocyclic lactones
-physical removal from host, cleaning/debridement of wounds
what is the prevention for horse bot eggs?
scrape eggs off host or apply warm water + insecticide
what is something that you need to be aware of when treating and preventing infections of flies?
-toxicities
-chemicals not approved for use in lactating dairy cows
what are some methods of environmental control? (broad)
-removal of larval habitat
-chemical control
-biological control
-non-chemical methods
-monitoring
what types of chemical control can you do for environmental control of flies?
adult flies - insecticides
larvae - insecticides, insect growth regulators
what type of biological control can you do for environmental control of flies?
-parasitoid wasps -> pupae of cyclorrhapans
-Bacillus thuringinesis -> larval stages
what type of non-chemical methods can you do for environmental control of flies?
-adult flies - screens, fly traps, flypaper, zappers
-mosquito larvae - modification of aquatic habitats (source reduction)
what type of monitoring methods can you do for environmental control of flies?
-standard, quantitative methods for monitoring fly numbers -> control decisions
-fly traps, spot cards, counting flies on sample of animals
what flies are classified as Nematocera?
-Mosquitoes
-Blackflies
-Midges
-sandflies
what Nematocera is a vector for canine heartworm and plasmodium?
Culicidae (mosquitoes)
what can culicidae cause in felines?
feline mosquito bite hypersensitivity
what family do the following genera belong to Aedes, Anopheles, Culex?
Culicidae/mosquito